CasterHQ's heavy duty stainless steel caster series is made to withstand harsh environments and applications that would normally rust and corrode standard zinc plated casters; all metal parts are made entirely out of high quality 304 STAINLESS STEEL. Double ball raceways and a 5/8” nut & bolt kingpin are standard features. Popular applications include; clean rooms, laboratories, medical & hospital facilities, animal cages, pharmaceutical plants, autoclaves, food processing, bakeries, dairy, food service, catering, hospitality, chemical factories, marine environments, fisheries, cruise ships, etc.