1,tiny tolerance,high precision 2,Material: stainless steel 316 3,customized according to your demand 4,ISO9001 certificated Specifications:Material: bronzeSurface treatment: well polishedProcessing method: bending stampingRoughness: Ra 0.8-Ra3.21, we are a professional manufacture for various stamping punching parts. We can produce them according to your drawings or samples if possible.2, the ...