This swivel caster has a wheel diameter of eight inches, a load capacity of 500 pounds, and double-ball hardened raceways. Each zinc-plated caster has a load height of 9 1/2 inches and a swivel radius of 6 1/2 inches, with a 1/2-inch hollow axle and 1/2-inch steel top plate. The wheel is made from Performa rubber.