Coupling Precision casting and machining Material: ST Steel 303 Certification: ISO9001:2000 OEM/ODM services CouplingNon-standard ... hardware, all kinds of gears, gear boxes, impellers, pumps, valves, flanges, joints...Material: cast iron, cast steel, alloy, alloy steel, alluminium, copper, ... samples, drawings or description.Your enquiries are fully appreciated. Collar for coupling of stainless steel