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  1. 4 Door Parcel Locker Cluster Mailbox
    As low as $2,349.00
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New Construction and 4C Mailboxes

Beginning on October 5, 2006, the U.S. Postal Service required all new designs approved for New Construction and Major Renovation to be compliant with U.S. Postal Service STD-4C.

Five Main New Features of the STD-4C Requirement:

  • New minimum size requirement of 12”w x 15”d x 3”h.

  • Strengthened security requirements for the entire unit.

  • Testing to verify indoor and outdoor use.

  • Meets Americans with Disabilities Act (ADA) standards.

  • Standardized and Improved tenant compartment lock design

Our 4C units meet or exceed the specification set by USPS.

Which 4C is Right For You?

Front Loading Wall Mount

We offer one of the largest selections of front-loading USPS Approved 4C mailboxes and accessories. You can choose from Salsburry Industries or Florence Mailboxes Manufacturing. Each front-loading mailbox includes a Master Loading Door prepared for the USPS Arrow Lock, which enables easy access to all compartments by the US mail carrier. Most often you’ll find Front-loading mailboxes, as they provide immediate access from the front.

Rear Loading Wall Mount

Mail is delivered to these mailboxes through the rear only. The hinged and latching rear doors are only accessible by a secure mail room. As these hinged and latching rear doors do not lock, a secure mail room behind the the mailboxes is required to keep mail safe  

4C Pedestal

Our 4C Pedestal mailbox comes with the same features of the 4C horizontal wall units, however, with the pedestal added, these units are outside of the USPS specifications and are only suitable for private use (unless you obtain approval from your local postmaster prior to purchase and installation). Please contact your local postmaster for approval.   

4C Mailbox Enclosures

Whether you are looking for a stand-alone enclosure or surface mount, or a package including both a 4C horizontal mailbox and a mail station kiosk, we’re sure you will be pleased with the selection we offer.  

4C Accessories

We carry a full range of 4C accessories, covering our Salsbury Industries and Florence Mailboxes Manufacturing products. If there’s a replacement part you need for your existing mailbox, search our site or contact one of our knowledgeable representatives to find exactly what you are looking for.

American Disabilities Act

We know that ensuring your new installation is accessible and according to standard is a priority for you. That’s why we provide in-depth USPS STD-4C information on all of our 4C mailbox products. You’ll find this information under the reference material on the product pages.

Customers Who Trusted Us With Their Projects

Major League Baseball
Harvard University
JP Morgan
U.S. Department of Defense
U.S. Department of State
USPS Approved
Balfour Beatty
Oregon Tech
Syracuse University