Dent and scratch resistant, rustproof Durable and washable Solid surface shelves prevent small items from falling through. Legsuprights, 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. Global Product Type Shelving UnitsBookcases Width 36 in Depth 18 in Height 74 in.