SIZE: Width: 19.7, Depth 17.7, with Height 19.8" (9U), also other option 4U, 6U, 12U, 15U, 18U wall mounted racks are available. MATERIAL: Heavy-duty, SPCC cold-rolled steel open frame construction can safely support up to 180 lbs. 80 kgrack mount equipment. The black RAL9005 powder coat finish makes this 2 posts 9U rack resistant to scratching and rusting, Matte black is usually a safe choice for recording studio, gaming room, Hifi room, home theater, conference room, garage room, study room, weak current room & communication room.