High quality latex lodging housekeeping cart maintenance free caster set. Listing is for a set of four (4) Service Caster series swivel casters with bolt on swivel locks and 8 inch diameter by 2 inch wide grey thermoplastic rubber donut tread on grey polyolefin core wheels capable of supporting a total weight of 2,400 lbs. (600 lbs./caster). Greased maintenance free precision ball bearings for a quieter, easy, and hassle free experience.