Aluminum rack ladder system mailboxes for Private Access, Keyed versions can be accessed by the U, S, P, S, when installed in rotary mail centers, Ideal for colleges, schools, private postal centers, corporate mail centers, military bases, government agencies and many other applications, Compartments are constructed of 20 gauge steel, Compartments have open backs, Doors are made of 1/4"" thick extruded aluminum, Doors feature a powder coated aluminum finish, Each door includes a 5 pin cylinder cam lock (with 2 keys), Designed to be installed between rack ladders (order separately), Salsbury Industries is an ISO 9001: 2008 certified company and has excelled in the field of manufacturing since 1936, Finish: Aluminum, 10 Door, Style: Locking, Door Size: 10-3/4""W x 5-1/2""H, Unit Size: 23-1/4""W x 12-1/8""H x 15-1/2""D, SKU: SBRI0035