4 Piece Thermoplastic Rubber Set

Listing is for a set of four (4) service caster series #30 casters, two (2) swivel casters with side lock brakes & bolt on swivel locks and two (2) swivel casters with a bolt on swivel locks, with 4" diameter by 2" wide thermoplastic rubber flat tread on polyolefin core wheels capable of supporting a total weight of 500 lbs. (300 lbs./caster).