U.S. Mail Supply Categories

Front-loading Horizontal Mailboxes – 21 Doors

1400-73 Florence 4B+ 21 Door Horizontal Mailbox

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21 Door Multi Unit Mailboxes in Dark Bronze
Product Number:
38.7500 Inches.
20.7500 Inches.
16.5000 Inches.
63 lb(s).
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1 - 4 $798.00
5 and more Call For Price
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Product Features

  • 7-high x 3-wide configuration
  • Module contains a total of 21 doors – 20 usable tenant mailboxes (5” high x 6 3/8” wide x 15 ½” deep)
  • Unit comes standard with 5-pin cam keyed mailbox locks.
  • Standard Clear Anodized Aluminum Finish. For an upcharge, also available in Dark Bronze. Click Here to view a color chart.
  • NOTE: Any customization of this unit, including optional color, non-standard lock and/or custom configuration will require an upcharge – Call for details
  • Click Here to view or download a shop drawing of this product – Please call for a shop drawing of multiple unit side-by-side configurations

21 Door Front-Loading Mailboxes for Office Buildings, Condos and Apartments

Easily mounted and installed, this product is the 21 door version of the 1400 Series horizontal mailbox. Having a simple, small mailbox door is an easy way to distribute large amounts of mail in any commercial or residential building. The way this mailbox is designed deters unauthorized access by lowering the risk of sensitive or personal mail being stolen. This product is great for use in standard tenant mail collection, inter-building communication, and rent collection, with such versatile units it’s no surprise we get five star ratings!

In addition to multifunctional products, U.S. Mail Supply offers two different types of mailbox security for every different product in this line. Besides simply working correctly with low maintenance, the most common issue or worry we are asked about is how we keep our mail delivery systems secure. We offer USPS Approved cam-locks with 1,000 key changes. This is the most popular option and otherwise standard on all horizontal mailboxes.

Contact U.S. Mail Supply today for more information regarding our security features for mailboxes!