4C Horizontal Mailboxes af Salsbury Industries

Required for new construction and major renovations, 4C horizontal mailboxes are ideal for commercial buildings, multi-family housing units, apartment complexes, government and military bases, schools, colleges and other residential and commercial developments. Salsbury Industries manufactures USPS STD-4C Recessed Mounted Horizontal mailboxes that are required for new construction and/or major renovations. 4C mailboxes are made of heavy duty aluminum and stainless steel hardware and come available in configurations that are 1 door wide (single column) and 2 doors wide (double column). Note: Salsbury surface mounted and free-standing 4C horizontal mailboxes include a U.S.P.S. approved 4C horizontal mailbox unit, a matching enclosure and master commercial lock(s) for private access. For access by the U.S. Postal Service, contact your local postmaster for approval.