4 Piece Polyurethane on Cast Iron Caster Set

Listing is for a set of four (4) service caster series #35 casters, two (2) swivel casters with bolt-on swivel locks and two (2) rigid casters, with 6" diameter by 2" wide polyurethane on cast iron wheels and maintenance free precision ball wheel bearings. Capable of supporting a total weight of 4800 lbs. (1200 lbs./caster).