... customized according to your demand 4,ISO9001 certificated Specifications:Material: carbon steelSurface treatment: zinc platedProcessing method: cold drawnRoughness: Ra 0 ... , like copper, brass, bronze, aluminum, stainless steel, and carbon steel etc.3, the processing technique we adopt has many ... on.4, our company is located in the capital of China Beijing, so it’s very convenient for your visit. ...