Metal stamping 1.Material:stainless steel 2.Technique:stamping,welding 3.Finish:passivating 4.ROHS,ISO ... ,tapping,silkscreening,welding,progression die,grinding,riveting,etc.2.Material: stainless steel, brass, copper, aluminum, iron(SGCC,SPCC,SECC),etc.3.Surface ...