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16-Door High Suite (56 1/2″H) Compartments – (2 to 20 USPS Approved Mailboxes)

The 4C horizontal mailboxes are built to withstand extreme weather conditions. The mailboxes are constructed out of heavy-gauge aluminum and corrosion-resistant steel for superior strength. The 4C series 16-door mailbox is designed for indoor or outdoor use, making it an ideal mailbox for apartments, offices, and multi-unit buildings serviced by the US Postal Service.

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USPS Mailboxes

Subject to local regulations and installation requirements, our products can comply with USPS standards, as defined by the Postmaster General.

Please note that the USPS periodically updates mailbox standards and guidelines. Before proceeding with mailbox projects, we recommend you consult with your local Postmaster to comply with your specific area guidelines. US Mail Supply experts are standing by to help you navigate the product selection and installation process.