This ATA rack case is constructed of 3/8" thick plywood with a hard black laminate exterior and totally surrounded with thick aluminum extrusion which is permanently machine riveted together. It is finished with all recessed catches, handles and steel ball corners to meet ATA specs. The case also has threaded front and rear rails for mounting standard 19" rack mountable equipment. The shell of the rack is 15" deep without the lids. Each lid is 2 1/4" deep.