Listing is for a set of four (4) service caster series #35 casters, two (2) swivel casters with side lock brakes & bolt on swivel locks and two (2) rigid casters, with 8" diameter by 2" wide solid polyurethane wheels and maintenance free precision ball wheel bearings. Capable of supporting a total weight of 4,800 lbs. (1,200 lbs./caster).