Free-Standing Mail Stand Enclosure with 4C Horizontal Collection Box Unit – H3911S-1C

Product Code: H3911S-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 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:

  • Local USPS Approval Required
  • 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, Black, Bronze, and Sandstone(shown). Free-Standing Enclosure and 4C Receptacle Bin must be the same color.


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


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