Includes trim, heavy duty cam lock with three key. Nineteen MB1 door and two PL. 4C horizontal mailboxes are U.S.P.S. approved. For indoor or outdoor use. Durable powder coated finish. ADA compliance guidelines. ISO 9001: 2008 certified. Stainless steel hardware. Maximum height unit. Rear loading. Usps access. Made from aluminum. MB1 door: 13.25 in. W x 3.25 in. H. Trim: 0.75 in. W x 0.25 in. H. Overall: 31.125 in. W x 17 in. D x 56.75 in. H (170 lbs.). Installation Instructions. Ideal for apartments, commercial buildings and residential developments.