The Luxor STC221 24 x 18 Three Shelf Heavy-duty Utility Cart is an easy and quiet rolling cart. The cart is made of polyethylene and has a lifetime warranty. It has top flat and middle shelves and a bottom tub shelf; tub is 2 3/4 deep. The clearance is 12 between each shelf. The top shelf is reinforced w/ a steel bar. The cart is transported by a push handle molded into the top shelf and four 4.0 casters, two w/ a locking brake. 300 lb. Weight Capacity.