All 18 D x 24W shelves have a 1/4 safety retaining lip and a raised texture surface to enhance product placement and ensure minimal sliding. 3-outlet UL listed electrical assembly with a 15 ft. cord, cord management wrap, and three cable management clips. Electrical attachment is recessed to insure easy passage through doorways. Four 4 silent roll, full swivel ball, bearing casters, two with locks, max. weight rated at 125 Lbs. each. Three shelf models will hold 200 Lbs., of evenly distributed weight. Shelves and legs are made from recyclable material. WTD Locking Drawer Features: This 19W x 141/2D x 5H key locking steel pullout drawer is great for storing presentation materials or your laptop!All open shelves. 34 Height. Additional WT-D Drawer and Keyboard Tray may be purchased .seperately.