Provides a sliding shelf for front access to all equipment. Mounting hardware not included. 18"D (460 mm) shelf extends out an additional 16" (410 mm) from closed position. Lockable in fully extended and fully retracted positions. 19" version holds up to 16"W x 17.5"D (410 mm x 445 mm) equipment, 23" version holds up to 20"W x 17.5"D (410 mm x 445 mm) equipment. Mounts on 3"D (80 mm) double-sided racks only. Made of sturdy, lightweight aluminum; supports up to 100 lb (45.4 kg).