Welded steel construction. Cabinets are 18 gauge steel for the sides and 22 gauge for the shelves. Wire management cut outs in lower portion of cabinet. Wire management space behind the shelf in the back of the cabinet is approximately 6-1/2". Ventilation cutouts on sides of cabinet for air circulation. 2 inches backstop on three sides of top with non-slip rubber pad. Doors open a full 180° for easy access. Room for approximately 16 laptops on 36” shelves, and 24 laptops on 46” wide model. Four 5" casters - 2 locking. Powder coat finish.