Includes U.S.P.S. master locks, mail slot, weather protection hood and trim. USPS access. Front loading. For indoor or outdoor use. Stainless steel hardware. Durable powder coated finish. Two MB2 doors, one MB3 door and one PL5. Three keyed heavy duty cam lock door with a dust and rain shield. Outgoing mail with two MB1 doors in one compartment. USPS-STD-4C Specifications. ADA compliant. ISO 9001: 2008 certified. Made from heavy duty aluminum. MB2 door: 13.25 in. W x 6.75 in. H. MB3 door: 13.25 in. W x 10.25 in. H. Parcel Locker (PL5): 17.25 in. H. Mail slot: 10.75 in. W x 0.75 in. H. Trim: 0.75 in. W x 0.25 in. D. Overall: 31.125 in. W x 17 in. D x 27 in. H (90 lbs.). Installation Instructions . Ideal for apartments, commercial buildings and residential developments. U.S.P.S. standard 4C requires a minimum of 1 parcel locker for every 10 tenant compartments. Outgoing mail compartment cannot be used for mail distribution. Required for new construction and major remodels.