Free-Standing Mail Stand Enclosure with 4C Horizontal Collection Box Unit USPS Approved – H3912S-1C

Product Code: H3912S-1C
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High-Security Commercial Horizontal Mailboxes Made in the USA

Wholesale Prices

Free-Standing Mail Stand Enclosures with 4C Horizontal Mailbox Units from National Mailboxes provide the perfect solution for your stand-alone installation needs. This kit allows your 4C mailbox and collection box unit to be easily mounted indoors or outdoors! 4C Commercial Mailboxes are USPS Approved and meet or exceed STD-4C requirements for new construction and major renovations. They are also ideal for private delivery applications.

Unit Size: 69-1/4″H x 17-1/2″W x 19″D
Total Doors: 1 Front Access Hopper Door
Front Access Hopper Door Size: 7-5/8″H x 12″W

Product Features:

  • Front Loading Horizontal Style
  • Includes a recessed mounted 4C Horizontal Collection Box Unit and a matching Free-Standing Enclosure – minor assembly required
  • Ideal when wall installations are not available
  • For indoor or outdoor use
  • Features a 12″ W x 7-5/8″ H front access hopper door
  • Constructed of heavy gauge aluminum and stainless steel hardware
  • Features a durable powder coated finish available in aluminum, bronze, gold and sandstone
  • Accessed from the front through lockable access door
  • Includes a factory installed master commercial lock
  • USPS Approved
  • Please Note: This large commercial Collection Box is made to order and is non-returnable

Product Options:

  • Custom engraved placards
  • Custom engraved doors – regular
  • Custom engraved doors – black filled
  • Replacement locks
  • Additional keys

Mailbox Colors: Aluminum, Bronze, Gold, and Sandstone (shown). Free-Standing Enclosure and 4C Collection Box must be the same color.


Free-Standing Mailbox Configurations
Free-Standing Installation Instructions
Free-Standing ADA Accessibility Guidelines


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