... brass 2,customized sureface treatment 3,High QC standard 4,OEM service offered We are specializing in manufacturing all kinds of precision ... yellow passivation, gold passivation, galvanizing, satin, etc.Processing Methodcnc machining, turning, milling, drilling, grinding, broaching, welding and ... Europe and China. small stamping part , stainless steel stamping, aluminium stamping, brass stamping