Internal gear Precision casting, high quality Certification: ISO9001:2000 OEM/ODM service Precision:within 0.01mm internal gear1. material:stailess steel, carbon steel, alloy ... wheels, pumping-using fan tools, tank-washing machine parts, water pump body, oil mechanical flow meters, valves, flanges, auto parts, ... or description.Welcome to enquire and visit! Customized stainless steel internal gear