Includes master professional locking mechanism, mail slot, water security hood, trim along with a great back cover. For outdoor or indoor use. 3 keyed serious responsibility cam locking mechanism entry door with a dust and also rain shield. 11 door top device. Single column with 9 MB1 doors. Home loading. Stainless steel hardware. Strong powder coated finish. ADA compliant. USPS-STD-4C requirements. ISO 9001: 2008 credentialed. Made from tough aluminum. MB1 door: 13.25 for. W x 3.25 around. H. Mail slot: 10.75 for. W x 0.75 around. H. Trim: 0.75 within. W x 0.25 around. D. Overall: 16.38 within. W x seventeen in. D x forty one in. H (75 lbs.). Set up Instructions. Ideal for colleges, numerous additional applications, governing administration agencies, military bases, business mail centers, private postal centers and schools.