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Front-loading Horizontal Mailboxes – 20 Mailboxes + Outgoing

Product Number: 1400-55OU
What you need to know before you buy.

Bulk Pricing Options Available


1-4 $2,271.00

5+ Call for price

Before You Buy:

  • Only USPS Approved for replacement purposes (replacing existing Horizontal mailboxes in same wall opening)
  • It is strongly recommended that you consult with local Postal Officials prior to ordering – Local Postmaster Approval is required
  • Approved and warranted for Indoor Use only
  • Also available for Private Mail Delivery (non-USPS)
  • Recess mounted only – 17” of wall depth is required
  • Cannot be surface mounted on a wall, pedestal mounted or free-standing








Additional Resources:

Standard configuration details & dimensions
Weight 87 lbs
Mailbox configuration 5x5
Number of mailboxes 20
Actual Unit Size
Height 28.00"
Width 33.63"
Depth 16.50"

Front-loading Horizontal Mailboxes from US Mail Supply

  • 5-high x 5-wide configuration
  • The module contains a total of 20 usable tenant mailboxes (5” high x 6 3/8” wide x 15 ½” deep), plus 1 Outgoing Mail compartment (10 3/8" high x 12 7/8" wide x 15 1/2" deep)
  • The unit comes standard with 5-pin cam keyed mailbox locks.
  • NOTE: Any customization of this unit, including optional color, non-standard lock and/or custom configuration will require an upcharge – Call for details
  • View or download a shop drawing of this product – Please call for a shop drawing of multiple-unit side-by-side configurations

20 Mailbox Plus Outgoing Box Unit for Commercial and Residential Buildings

US Mail Supply’s selection remains the best when finding a mailbox solution for your tenants to send and receive their daily mail in a secure fashion. Delivered completely assembled, our products consistently save our customers time and money. This horizontal mailbox has twenty available compartments and a large parcel container for sending mail in a two-in-one mail delivery system perfectly suited for an owner of a large residential or commercial location. Every 1400 Series comes with US Mail Supply’s standard snap-on trim and mailbox customization options.

Expert manufacturers work with U.S. Mail Supply so you are able to select the type of finish, locks, and door engraving or labeling you prefer for your professional establishment’s mailbox delivery system. This specific product can be customized to your tastes, and its standard size makes it perfect for rooms with limited space.

Contact horizontal mailbox distributors at U.S. Mail Supply today to provide your residents with a secure postal system.
Make sure to choose the RIGHT mailbox.

Don't worry, we can help you figure out what's best and most cost efficient for your space. A representative at U.S. Mail Supply will help you figure out what is required for USPS or private delivery, the number of units you need and any information required for installation.