Product Description Salsbury 3500 Series Vertical Mailboxes - Recessed Mounted - U.S.P.S. Access are are U.S.P.S. approved for replacement and/or retrofit installations. Ideal for apartments, condominiums and commercial buildings. Made entirely of aluminum. Feature a durable powder coated finish available in aluminum, brass, bronze, sandstone and green. 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. Doors and trim are striated to resist scratching. Mailboxes are available with 3 to 7 compartments. Salsbury Industries is an ISO 9001: 2008 certified company and has excelled in the field of manufacturing since 1936. From the Manufacturer Salsbury 3500 Series Vertical Mailboxes - Recessed Mounted - U.S.P.S. Accessare are U.S.P.S. approved for replacement and/or retrofit installations. Ideal for apartments, condominiums and commercial buildings. Made entirely of aluminum. Feature a durable powder coated finish available in aluminum, brass, bronze, sandstone and green. 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. Doors and trim are striated to resist scratching. Mailboxes are available with 3 to 7 compartments. Salsbury Industries is an ISO 9001: 2008 certified company and has excelled in the field of manufacturing since 1936.