Salsbury Vertical Mailbox - 3 Doors - USPS Access (Ships in 1-2 Days)


Shipping Time

IN STOCK - Ready to ship.

Vendor: Salsbury
Type: Vertical
Model: 3503ARU


Salsbury 3500 Series 4B+ Vertical Mailboxes - Recessed Mounted - U.S.P.S. Access


  • 4B+ Vertical mailboxes are U.S.P.S. approved for replacement and/or retrofit installations
  • Manufactured by Salsbury Industries to USPS-STD-4B+ Specifications
  • Ideal for apartments, condominiums and commercial buildings
  • Made entirely of aluminum
  • Feature a durable powder coated finish available in aluminum, bronze and sandstone
  • Rough opening for recessed mounted vertical mailboxes is 1-1/2" less than the unit's width, 1-1/4" less than the unit's height and equal to the unit's depth
  • Fits into a rough opening and secured with mounting hardware (not included) through the back or side panels
  • Units include a fully integrated flanged collar which fits over the rough opening
  • Individual compartment size is 5-1/2" W x 16-1/4" H x 6-3/4" D
  • Doors and trim are striated to resist scratching
  • Doors include a 5 pin cylinder cam lock (with 2 keys)
  • Mailboxes are available with 3 to 7 compartments
  • Salsbury Industries is an ISO 9001:2015 certified company and has excelled in the field of manufacturing since 1936

Material: Aluminum


  • Custom engraved placards
  • Outgoing 4-3/4'' W x 1/2'' H mail slot
  • Replacement locks
  • Additional keys
  • Key blanks



  • Vertical Mailbox Video
  • Installation Video – Tenant Door Replacement
  • Installation Video – Tenant Lock Replacement