1,tiny tolerance,high precision 2,Material: carbon steel 3,customized according to your demand 4,ISO9001 certificated Specifications:Material ... .8-Ra3.21, we are a professional manufacture for various stamping punching parts. We can produce them strictly according to your ... , like copper, brass, bronze, aluminum, stainless steel, glassfibre and carbon steel etc.3, the processing technique we adopt has ...