"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. Mount Height in. 7 1/2, Foot Brake No, Casters qty. 1, Top Plate Dimensions L x W in. 4 1/2 x 4, Overall Height in. 7 1/2, Bolt Hole Spacing 3-3 5/8 x 2 5/8-3, Caster Type Swivel, Wheel Diameter in. 6, Capacity lbs. 410, Finish Type Zinc plated, Wheel Width in. 2, Material Type Steel, Wheel Type Thermoplastic rubber, Bearing Type Roller. Bright zinc-plated finish Sectioned forked legs for added strength Double-ball raceways for added strength and swivel-ability Rugged 3/4in. king pin"