The listing is for a set of four service caster series #30 casters, two swivel casters with side lock brakes & bolt-on swivel locks, and two swivel casters with a bolt-on swivel locks, with 8" diameter by 2" wide semi-steel cast iron wheel and maintenance-free precision ball wheel bearings capable of supporting a total weight of 5,000 lbs. (1,250 lbs./caster).
