Precision Welding Parts 1.Certain mechanical strength 2.Smooth mellow 3.certification : ... ,AL6061,AL6062,AL7075CopperCopper , Brass, BronzePlasticPVC,Bakelite,Derlin, AS Derlin, Acrylic,Anti-Stalic, Acrylic,PC, Black Conductive Plastic, Telfon, NylonEngineering PlasticSemitron 410C ,S1000 ... .003ID/OD Grinding 0.002Wire-Cutting 0.002 Stainless Steel Welding Parts