The Dolly Base is constructed of impact-resistant copolymer with reinforced caster mounts and a rib-reinforced base. There are 5 in. casters and optional handles for superior performance. The Dolly base easily holds up to 350 lbs. Optional 1/2 in. (1.3 cm) hole for drainage. Covers fit all Vollrath racks and most major competitors. - Plastic; beige - Capacity 350 lb - Length/Width 21 in - Sold per each