4 Piece Poly on Steel Caster Set

The listing is for a set of four (4) service caster series #30 casters, two (2) swivel casters with bolt-on swivel locks and two (2) rigid casters, with an 8" diameter by 2" wide polyurethane on a cast iron wheels capable of supporting a total weight of 5,000 lbs. (1,250 lbs./caster).