... aluminum alloy 2.Finish:zinc platd,polish cnc stainless steel machining precision part Strictly quality control by 100% inspectionSmall ... . In addition to CE and BV mark of the products, we have won quality certificate in accordance ... , aluminum alloy, copperProcedurewelding,stamping,cutting,punching,bending,grinding,machining,threadingSurface finishingzinc plating, hot dipped galvanized, powder coat, ...