This swivel plate caster features a 1 1/2 x 5-inch black phenolic wheel with a wheel brake. Each caster has a load rating of 500 pounds and is made from steel with a zinc finish. The mounting plate measures 4 1/8 x 3 3/8 inches with a mounting bolt diameter of 3/8 inches and an inside/outside bolt hole spacing of 2 3/8 x 3 1/8 inches. Use item number AC515B for replacement wheels.