Dent- and scratch-resistant, rustproof Durable and washable Solid surface shelves prevent small items from falling through. Legs/uprights, constructed of heavy wall polypropylene plastic, interlock for extra strength. Commercial grade, open shelf system. Blow-molded high-density polyethylene shelf engineered for 180 lbs. per shelf load capacity. 18" clearance between shelves. Includes feet to raise system 2" off floor. Wall clips for extra security.