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Front-loading Horizontal Mailboxes – 18 Doors

Product Number: 1400-63
What you need to know before you buy.

Bulk Pricing Options Available


1-4 $1,465.00

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 65 lbs
Mailbox configuration 6x3
Number of mailboxes 17
Actual Unit Size
Height 33.38"
Width 20.75"
Depth 16.50"

Front-loading Horizontal Mailboxes from US Mail Supply

  • 6-high x 3-wide configuration
  • The module contains a total of 18 doors – 17 usable tenant mailboxes (5” high x 6 3/8” wide x 15 ½” 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

18 Door Horizontal Mailboxes for Apartments and Office Buildings

For more than 80 years, U.S. Mail Supply has ensured confidence and peace of mind for our customers with our mailbox products and systems. This 1400 Series Horizontal 18-door mailbox comes with industry-leading postal security helping to protect sensitive mail and important packages from unwanted individuals. Customers never worry about quality with U.S. Mail Supply orders because our products are certified under the latest USPS regulations.

Multi-family residences, hospitals, military housing, and university dorms can all benefit from secure, no-hassle mail delivery systems. Custom orders in terms of color, lock selection, or additional mailboxes combining to make a postal system is made easy with our U.S. Mail Supply professionals who are always ready to help. We also have mailroom supplies available if you are planning a large-scale mailroom operation and need affordable prices. If you’re interested in our 18 door front loading horizontal mailboxes, give us a call today!

Contact our mailbox suppliers with any questions or to place an order today!
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.