"6in. x 2in. thermoplastic rubber wheel is made of high-impact, abrasion-resistant gray nonmarking rubber bonded to a polyolefin core. Designed for factory, warehouse, cold storage, food service and institutional use. Top Plate Dimensions L x W in. 4 1/2 x 4, Wheel Diameter in. 6, Wheel Type Thermoplastic rubber, Wheel Width in. 2, Casters qty. 1, Finish Type Zinc plated, Foot Brake No, Material Type Steel, Mount Height in. 7 1/2, Overall Height in. 7 1/2, Bearing Type Roller, Bolt Hole Spacing 3-3 5/8 x 2 5/8-3, Capacity lbs. 410, Caster Type Swivel. Bright zinc-plated finish Sectioned forked legs for added strength Double-ball raceways for added strength and swivel-ability Rugged 3/4in. king pin"