The Bud Industries SH-2389 sliding non-ventilated shelf measures 17"W x 21.25"D and is designed to fit cabinets and open racks with 19" wide panel spaces and all cabinet rack depths. The shelf is one-piece, 16-gauge steel with flanged front and rear to support up to 92 lbs. It comes with necessary mounting hardware. Additional brackets are furnished to allow flexibility in mounting. The Bud Industries sliding non-ventilated shelves allow sufficient room in rear for cables and power outlet strips. Requires two pairs of panel mounting rails per cabinet rack. Finish: Smooth black. Also available in ventilated version (Bud part SH-2393).