Salsbury 4C horizontal style commercial mailboxes are ideal for apartments, condominiums, office buildings, military bases and residential developments. Made entirely of aluminum, 3700 series 4C horizontal mailboxes are U.S.P.S. approved and available as front loading units or rear loading units.
Salsbury 4C horizontal mailboxes and parcel lockers meet the specifications of USPS-STD-4C. The 4C horizontal mailboxes are required for new construction effective October 2006. The USPS approved 4C horizontal mailboxes are available in three (3) different mounting options - 3700 series recessed mounted, 3800 series surface mounted and 3900 series free-standing 4C horizontal mailboxes.