Fast Shipping. Salsbury 3312-U 12 Door Cluster Mailbox - USPS Approved (Includes Pedestal) See More by Salsbury Industries. Locking: Locking mailbox. S mail delivery and. As a USPS approved manufacturer, Salsbury Industries conveniently sells USPS Approved Cluster Box Units (CBU's) factory direct. Salsbury 3308R-U 8 Door Regency Decorative Cluster Mailbox. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. S. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. And all powder coated paint finish colors are weather resistant, rust proof. High security USPS approved commercial mailboxes are built for safe mail delivery. The 4C line of mailboxes fit this need. Parcel lockers need to exist at a 1:10 parcel to customer compartment ratio. Phone: Call (866) 707-0008. S. $1,836. The 3300R Series is a USPS. Front Loading Style. Commercial and residential cluster mailboxes from U. Salsbury 4300 Series Roadside Mailboxes Features. 2. Residential & commercial mailboxes for sale in Pennsylvania. Postal Products Unlimited, Inc. For more product info contact the National Mailboxes Customer Support Center at 1-800-676-5161. Commercial Mail Boxes USPS Approved Mailboxes . And all powder coated paint finish colors are weather resistant, rust proof and corrosion. For more product info contact the National Mailboxes Customer Support. Black Filled Engraved Number Plates. 50 View Options; Newspaper Holder for Mail Chest Mailboxes – H4315. 4C mailboxes are USPS Approved and meet or exceed STD-4C re. Working Days/Hours: Mon - Fri: 6 a. USPostCompany. S Mail delivery) and private use/access style commercial mailboxes for private. Choose USPS-Approved Mailboxes. An approved Cluster or 4C Horizontal unit will be prepped for the U. Ideal for homes, colleges, schools, apartments, condominiums, office buildings, corporate mail centers, military bases and many other applications. Mail Supply are built with this in mind. Replacement Small CBU Parcel Locker Door (All Colors) As low as $55. Horizontal 4C mailboxes are USPS approved (STD-4C) and 4C depot style mailboxes are for private deliveries only. 4C Horizontal Mailboxes; Aluminum Style Mailboxes; Brass Style Mailboxes; Free-Standing Mailboxes. Mail: P. See full list on usmailsupply. Our CBUs have as few as four distinct compartments and as many as 16, including separate sections for large parcels. Commercial Mailboxes. Model # 3304R. The versatile 4C Depot is a free-standing mailbox cabinet that includes a USPS approved 4C horizontal mailbox and/or parcel locker unit. By USPS regulatory standards, your mailbox should be 41” to 45” from the ground or street surface and up to the inside floor of the mailbox. The cluster box itself measures 30. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. Local: 262-782-6510 Toll Free: 800-571-0147Mailboxes used in new construction projects can be one of the following two types of centralized mailbox equipment: Pedestal-mounted USPS-approved CBU. Postal Service. In business since 1936, Salsbury Industries is home to both our mailboxes. $2,210. 3312-U. 8 Available Colors. Many models include parcel lockers and letter drops for outgoing mail. Find the right commercial outdoor mailbox for your property. 50 View Options. Model # 3305U. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. USPS Approved Locking Mailbox Solutions | Florence Mailboxes Configurator FIND A DEALER The ultimate centralized mailboxes for your project — hassle not included. USPS approved locking mailboxes from US Mail Supply are available in a wide variety of styles and finishes. Put your house or apartment number on the mailbox. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. 15% OFF & FREE SHIPPING* ON ALL ORDERS IN OCTOBER. US Mail Supply offers a wide variety of USPS-approved mailboxes for homes and businesses. Model # 3816S-06. 00 Free Shipping. Florence high security cluster box units are USPS approved and considered the standard for outdoor centralized mail delivery. 20 Tenant Doors with 2 Parcel Lockers and 1 Outgoing Mail – Freestanding Depot Enclosure with 4C Horizontal Mailbox Unit (USPS Approved) – H4C16D-20-D. And all powder coated paint finish colors are weather resistant, rust proof. These regulations also apply to Post Mounted Mailboxes and Locking Mailboxes. We also have USPS-approved collection boxes by Auth Florence Manufacturing. Residential USPS Approved Mailboxes in Texas. Private Commercial Mailboxes. This kit allows your 4C Mailbox and Parcel Locker center to be easily mounted indoors or outdoors! 4C Commercial Mailboxes are USPS Approved and meet or exceed STD-4C. Depending on your location's requirements, we offer USPS approved and private delivery options as well. Americana mailboxes for Private Access; Ideal for colleges, schools, private postal centers, corporate mail centers, military bases, government agencies and many other applications; Units are 23-1/2" W x 26-1/2" H x 16" D 12 Door USPS Approved Cluster Mailbox. Multi-unit orders for commercial applications have many. 00 $51. USPS Commercial Mailboxes FILTER. $2,626. Model # 3507SU. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Our USPS. mail delivery and private-use access mailboxes for private party distribution. Contact Us. National Mailboxes offers a wide selection of high quality USPS Approved and private use-access style Pedestal Mailboxes. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. O. USPS-Approved Centralized Florida Mailboxes. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. $1,768. 00. You can purchase commercial mailboxes from Budget Mailboxes, of course! We offer USPS approved pedestal mount cluster mailboxes by the top two manufacturers in the U. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Local: 262-782-6510 Toll Free: 800-571-0147. A mailbox with the Postmaster General's (PMG) seal of approval meets USPS size and construction standards. 88 out of 5. 25 inches high. They are USPS approved and are available with front and rear loading compartments. And all powder coated paint finish colors are weather resistant, rust proof. Fully operational. 50. Doors: 34 usable “A” size doors. 3316-U. CBUs include secure tenant doors, an outgoing mail slot, and parcel. Learn More. Ideal for commercial buildings, multi-family housing units, apartment complexes, government and military bases, schools, colleges and other. S. Our USPS. 8 Door Cluster Mailbox - USPS Approved - Pedestal Included. Browse our locking residential mailboxes used for residential and commercial applications. Model # 1570-8T6. Commercial Mailboxes. The industry leader in the manufacturing and distributing of quality commercial and residential mailboxes and lockers, Salsbury Industries’ manufacturing facilities are vertically integrated to ensure that you receive quality. Availability: In stock. National Mailboxes offers a wide range of commercial mailboxes for multi-tenant, private, and high security use. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. Salsbury Cluster Mailboxes can be purchased via our website at mailboxes. in all weather conditions, making it the primary external delivery system for the USPS. Indoor or outdoor use. Quantity: Page 1 of 2 1 2 Next. S. 8 Door USPS Approved Cluster Mailbox. 3505. They are USPS Approved and can be used for either USPS Mail delivery or as private use/access style commercial mailboxes for private distribution. Postal Products Unlimited, Inc. Postal Carrier to install their arrow lock for the master door (this allows the postal carrier to deliver mail to all individual. Colors: Standard color is Anodized. Local: 262-782-6510 Toll Free: 800-571-0147. 4-Door 3500 Series Vertical Mailbox. 8 Tenant Door Traditional Decorative Style High Security CBU Mailbox with 2 Parcel Lockers (Pedestal Included) – Type 1 USPS Approved – H1570-8AF-DT. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. 00 Free Shipping. Commercial mailboxes have been the cornerstone to the National Mailboxes product line for many decades which supplies, manufacturers, and distributes a wide selection of multi-tenant commercial mailboxes. 00 Free Shipping. Choose from freestanding, wall mount, cluster, and parcel lockers. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. Residential & commercial mailboxes for sale in Pennsylvania. The Postal Service annually publishes a list of USPS-approved mailbox equipment and approved manufacturers in its Postal Bulletin. 8 Available Colors. Features. In business since 1936, Salsbury Industries is home to both our mailboxes. High-quality CBU Commercial Mailboxes (NEW 1570 F-Series Type) The Standard Style Cluster Box Units (CBU) from National Mailboxes are designed to meet or exceed the new USPS Security Standards. Ideal for commercial buildings, multi-family housing units, apartment complexes, government and military bases, schools, colleges and other. And all powder coated paint finish colors are weather resistant, rust proof. USPS Approved Cluster Mailboxes for Commercial or Residential with Free Shipping & Volume Discounts - only at Mailbox Directs. They are designed with elegance in mind, and are ideal for commercial developments and residential neighborhoods. We proudly sell commercial mailboxes, all of which are approved by the United States Postal Service, for use in schools, apartment complexes, hotels, and more. Shop all USPS approved mailboxes online from U. Recessed Mounted 4C Horizontal Mailbox - Maximum Height Unit (57 1/8 Inches) - Double Column - 15 MB1 Doors / 2 PL4. pedestal-mounted USPS- Approved Cluster Box units are great for outdoor use. 00 $299. Track packages, pay and print postage with Click-N-Ship, schedule free package pickups, look up ZIP Codes, calculate postage prices, and find everything. approved and available as front loading units or rear loading units. They are ideal for commercial use or residential applications such as housing developments, apartments or townhouses. Related Products; People Also Bought; IN STOCK. It’s spacious and features 12-door, 13-door, or 16-door configurations with keylocks. Affordable Decorative Municipal Quality Street Light Package - LED. EMPTY. 00. With many different door configurations and number of tenant door models available to choose from, National Mailboxes prides itself for being the North American leader for both residential style and commercial style durable and. These kits allow your 4C mailbox and Parcel Locker centers to be easily mounted indoors or outdoors! 4C mailboxes are USPS Approved and meet or exceed STD-4C. Horizontal 4C mailboxes are USPS approved (STD-4C) and 4C depot style mailboxes are for private deliveries only. Parts: We sell replacement parts for this product. Wholesale Pricing $ 718. Postal Service. Most bulk order sales are usually processed through our quote system. Made entirely of aluminum, 3700 series 4C horizontal mailboxes are U. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. 00 out of 5. You have not viewed any products recently. 12 Tenant Door Classic Decorative High Security CBU Mailbox with 1 Parcel Locker (Pedestal Included) – Type 2 USPS Approved – H1570-12AF-DC. Wholesale Pricing $ 2,523. 75. 6510 for more information on which mailbox is right for you. Contact US Mail Supply for more information on USPS approved commercial mailboxes. Postal Service will only deliver to your mailbox if it's up to their standards - including box size, location, slot dimensions and identification info. Model # 3706S-1P. USPS Approved Commercial, Apartment, & Residential Units The U. Buy Surface Mounted Vertical Mailoxes factory direct from mailboxes. Rated 4. Accommodate 1-29 residents per Mailbox Unit. Standard models are recessed in-wall mount style and optional surface mount collar. Most bulk order sales are usually processed through our quote system. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. ←. Salsbury vertical style commercial mailboxes are ideal for apartments, condominiums and office buildings and are designed for replacement and retrofit installations. In business since 1936, Salsbury Industries is home to both our mailboxes. Sort By: Page 1 of 1 1. Cluster Mailboxes - usps approved -. Product Line Features: USPS Approved for Replacement of Existing Wall Mounted Mailboxes. Made entirely of aluminum. Accessories: $10 – $35, $20 – $553. Americana mailboxes for Private Access; Ideal for colleges, schools, private postal centers, corporate mail centers, military bases, government agencies and many other applications; Units are 23-1/2" W x 26-1/2" H x 16" D12 Door USPS Approved Cluster Mailbox. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Mail Supply. Made entirely of aluminum. SKU. $1,999. 5 Oversized Tenant Doors with 2 Parcel Lockers and 1 Outgoing Mail – 4C Wall Mount 12-High Horizontal Mailbox Unit – H4C12D-05. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. The 4C horizontal mailboxes are required for new construction and/or major renovations effective. 8. Find the right commercial outdoor mailbox for your property. Outdoor Parcel Lockers (OPL's) are U. 00 $382. 50. Choose from our many U. Add to Wish List. Businesses and residents alike, especially older residents, will appreciate the convenience of centralized mail delivery. You can find our mailboxes in apartments, high schools, post offices, and hospitals across Colorado. Box 13144, Wauwatosa, WI 53213 Phone: 800-676-5161 We are a leading Wisconsin-based manufacturer & supplier of high-quality USPS Approved & private locking residential & commercial. P. 75. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Supplies Cost: $10 – $25, $15 – $40. The U. curbside delivery, come in four (4) contemporary colors and have an 11" W x 2" H mail deposit opening. The 1570 series CBU from National Mailboxes is designed to meet or exceed the new USPS Security Standards. Cluster Box Units (CBU'S) Standard Cluster Mailboxes; Regency Decorative Cluster Mailboxes; Outdoor Parcel Lockers (OPL's). Pre-approved by the USPS, cluster commercial mailboxes are considered the industry standard when it comes to outdoor, centralized mail delivery. Salsbury 3500 Series surface mounted vertical mailboxes are available in 5 contemporary colors. com and lockers. They are. 25 inches high. Browse our popular range of cluster mailboxes, 4C mailboxes, horizontal mailboxes, vertical mailboxes and various accessories today. Ideal for commercial buildings, multi-family housing units, apartment complexes, government and military bases, schools, colleges and other. Welcome to USPS. S. For a larger version of this product, see mail chests. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Local: 262-782-6510 Toll Free: 800-571-0147. 140055OUA Florence 4B Mailbox (5 High) Front Loading – 25 Doors (20 Usable) – USPS. Model # 3308R-U. 4C06D-10 - 10 Tenant Doors with Outgoing Mail Compartment - 4C Wall Mount 6-High Mailboxes USPS Approved $1,105. Some of our most popular styles include: Cluster mailboxes. 3910S-2P Salsbury Free-Standing 4C Mailbox ADA Height Compliant – Stand-Alone Parcel Locker – 2 PL5’s – Front Loading – USPS Access (Includes 3710S-2P Mailbox and 3910SX Enclosure) – 10 Door High Unit (52-3/4 Inches) – Single Column. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. They also include parcel lockers, drop boxes. $1,768. Introducing the New "F" series CBU -- designed to meet or exceed new USPS Security Standards. 00 Free Shipping. S. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. New communities and commercial complexes will need USPS mail delivery. Mailbox Cost: $14 – $50, $25 – $75. Wholesale Pricing $ 3,268. the RIGHT mailbox. Letter drop boxes are typically used in commercial buildings for mail collection. 00 $2,279. 97 out of 5. And all powder coated paint finish colors are weather resistant, rust proof. Mail Chest Model # 4350 . 4B+ horizontal mailbox features: The 1400 Series Horizontal mailboxes are USPS 4B+ Compliant and are available prepped to accept the USPS Arrow lock, or for private mail delivery (upcharge applies). The industry leader in the manufacturing and distributing of quality commercial and residential mailboxes and lockers, Salsbury Industries’ manufacturing facilities are vertically integrated to ensure that you receive quality products that are manufactured and shipped in a timely. At BudgetMailboxes. Horizontal 4C mailboxes are USPS approved (STD-4C) and 4C depot style mailboxes are for private deliveries only. $483. 3504. $1,938. Free quotes. S. Florence 12 Tenant Cluster Mailbox Model #1570-12. If you want a mailbox compliant with US Postal Service STD-4C, we have them. Postal Service will only deliver to your mailbox if it's up to their standards - including box size, location, slot dimensions and identification info. delivery, including cluster box units (CBUs), 4C horizontal mailboxes, 4B horizontal mailboxes, 4B+ horizontal mailboxes and more. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. 3 Approved Models 1. Horizontal 4C mailboxes are USPS approved (STD-4C) and 4C depot style mailboxes are for private deliveries only. Front Loading Style. 800. S. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Contact us online , or call (541) 389-4928 for more details. Regulations for Residential and Commercial Mailboxes. delivery, including cluster box units (CBUs), 4C horizontal mailboxes, 4B horizontal mailboxes, 4B+ horizontal mailboxes and more. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. The Salsbury Standard Cluster Mailbox and Regency® Decorative CBU Type I, Type II, Type III, Type IV, Type V, Type VI and Outdoor Parcel Lockers (OPL's) are all licensed and approved by the U. S. Florence 12 Tenant Cluster Mailbox Model #1570-12. The design caters to high volumes of mail for those who are unable to collect mail frequently. 782. Mail Supply include locking mail chests, package delivery vaults, courier drop boxes, key keepers, and package protectors. S. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Add to Cart. Mail Supply - perfect USPS approved or private use boxes for commercial or residential areas. USPS approved 12 door cluster mailbox - The Florence vital™ F-series is the perfect outdoor pedestal mailbox for apartments and commercial buildings. 00 $3,239. Be sure that your packages are under ten ounces, unless you are mailing to an APO, DPO, or FPO location and are paying with a method other than postage stamps. Each CBU comes with high-security features that deter mail theft before it starts. Find a variety of USPS approved mailboxes for new construction, renovation or replacement projects, including cluster, horizontal, vertical, locking and parcel delivery. F181570-12. S. Rated 4. Learn more!Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. $2,079. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Salsbury 3700 series 4C horizontal mailboxes and parcel lockers meet the specifications of USPS-STD-4C. Be sure that your mailboxes adhere to the following: USPS Regulations. View Options. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. com and lockers. Cluster Box Units (CBU’s) Standard Cluster Box Units; Decorative Cluster Box Units; Outdoor Parcel Lockers; 4C Horizontal Mailboxes. approved; Manufactured by Salsbury Industries to USPS-STD-7B specifications; Made entirely of aluminum; Feature both a front and rear access locking door; Include a lock with 2 keys on each door (keyed alike)American Mailboxes USA specializes in USPS approved mailboxes, with over 450 designs and the option to customize. The units range in size from eight to 30 doors, so you get a heavy-duty mailbox that fits your facility. 9 Door 4C Standard Mailbox 2 Parcel Lockers - Additional Colors Available. 782. Including the pedestal, the total unit height is 62 inches. When sending outgoing mail, customers simply need to drop it off at the mail slot. If you need a large or specialized order, such as for college dorms, hospital patients, or nursing home residents, please call us at (866) 707-0008. Indoor commercial mailboxes from US Mail Supply are built to USPS size and construction standards. Mail Supply today or call us at 262. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. The Salsbury Standard Cluster Mailbox and Regency® Decorative CBU Type I, Type II, Type III, Type IV, Type V, Type VI and Outdoor Parcel Lockers (OPL's) are all licensed and approved by the U. Strengthened security requirements for. Including the pedestal, the total unit height is 62 inches. Mailboxes used in new construction projects can be one of the following two types of centralized mailbox equipment: a. If you need a large or specialized order, such as for college dorms, hospital patients, or nursing home residents, please call us at (866) 707-0008. $3,159. The Salsbury Standard Cluster Mailbox and Regency® Decorative CBU Type I, Type II, Type III, Type IV, Type V, Type VI and Outdoor Parcel Lockers (OPL's) are all licensed and approved by the U. These mailboxes are designed for multi-tenant. 00 $2,507. Specializing in both high-security, USPS Approved commercial mailboxes for U. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Whether you need a great professional look for a business park or industrial. If you need a large or specialized order, such as for college dorms, hospital patients, or nursing home residents, please call us at (866) 707-0008. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. Wall-Mounted: $100 to $300 for 2-6 boxes and $455 to $1,200 for larger units. 00. A USPS Approved mailbox refers to any commercial or residential mailbox that is pre-approved by the Post Office prior to proper installation. Postal Service will only deliver to your mailbox if it's up to their standards - including box size, location, slot dimensions and identification info. All installation is done by licensed and insured installers. The industry leader in the manufacturing and distribution of quality commercial mailboxes and residential mailboxes, Salsbury Industries is officially licensed by the USPS to manufacture Cluster Box Units (CBU’s). All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. When it comes to commercial mailboxes for sale in Connecticut, you won’t find better selection, service—or prices. 00. 0147. Product Code: H1570-16AF. Details. Recessed In-Wall Mount Style or Surface Wall Mount Style Available. We even have vertical options, like the Salsbury 3503RP and 3308-P, for small properties. Approved by the Postmaster General ®. One of our most popular products is the Cluster Box Units (CBU). b. approved and available as front loading units or rear loading units. Includes: Mailbox, Tenant Door Locks With 3 Keys Each, 20 Tenant Compartments, 2 Parcel Compartments, Outgoing Mail Slot. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. com. 1 Approved Models – A list of manufacturers whose mailboxes have been approved by the United States Postal Service (USPS) will be published annually in the Postal Bulletin. The cluster box itself measures 30. USPS Approved Commercial Mailboxes. Availability: In stock. According to USPS mailbox requirements, commercial mailboxes should abide by Standard 4C Mailbox Specifications. 1. Find the right mailbox with maximum security. USPS Approved for Replacement of Existing Wall Mounted Mailboxes. USPS Approved Commercial, Apartment, & Residential Units The U. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. Mail Chest Locking Mailbox (USPS Approved) – H4350. The USPS may prefer to deliver to each tenant in one location as well. S. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. And all powder coated paint finish colors are weather resistant, rust proof and corrosion. Mail package drops are U. We have a wide range of styles and brands for both residential and commercial use. Technical Specifications (Dimensions, etc. 1570-16AF - 16 Tenant Door Standard Style CBU Mailbox (Pedestal Included) - Type 3 USPS Approved Mailboxes. All high quality powder coated finishes are rated and approved for outdoor/indoor use and installations. 4C Horizontal Mailboxes . Email Us: Submit a Ticket. To open your PO Box online: Step 1: Search for Post Office locations near you by using the search bar under "Find a PO Box Near You. The new, USPS-approved 4C series of mailboxes contain multiple horizontal customer. Free-Standing 4C Horizontal Mailbox Unit (Includes 3716D-6P Parcel Locker, 3916D Enclosure and Master Commercial Locks) - Maximum Height Unit (72 1/8 Inches) - Double Column - Stand-Alone Parcel Locker - 2 PL4. Learn More. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Industry-exclusive features, finishes and accessories available. Colors apply to select mailboxes which include most of the primary USPS Approved commercial mailbox product lines including the NEW 4C Series and CBUs. Pre-approved by the USPS, cluster commercial mailboxes are considered the industry standard when it comes to outdoor, centralized mail delivery. 2. The 4C mailboxes are approved for all new installations by the USPS. And all powder coated paint finish colors are weather resistant, rust proof. If you run an apartment complex, you likely have a lot of tenants that need mail.