0.25 in. thick extruded Aluminum doors with a durable Powder Coated Aluminum finish . Each door includes a 0.75 in. high door slot, a five pin cylinder cam lock with two keys and is hinged horizontally at the bottom . Doors are available without slots upon request . Constructed of 20 Gauge Steel . Data distribution system boxes are designed to be installed between rack ladders . The rack ladders support five units to form a column of boxes . Used in Free-Standing Rotary Mail Centers and Free-Standing Roll-A-Bout Mail Centers . Made of Aluminum. Comes standard with lock and keys for each individual mailbox. Does not include master lock for U.S.P.S. entry; must be provided by U.S.P.S.. 23.5 in. W x 15.5 in. D x 12.125 in. H (40?lbs.)