Computer USB connector 1.Smooth surface,burr-free 2.High precision,good stability ... , Europe and America, etc.Production details:Zinc casting computer USB connector part Materialaluminum alloy A380,A360.ADC12,Zinc alloy 3#zinc,5 ... coating3.painting4.anodization5.electrophoresis6.zinc plating7.black oxidation.SoftwarePro/E, Auto CAD, Solidwork, CAXA UG, CAD/CAM/CAE CertificateISO9001:2008, ROHS ...