Computer USB connector 1.Smooth surface,burr-free 2.High precision,good stability 3.ISO9001,ROHS 4.OEM ... , Japan, Europe and America, etc.Production details:Zinc casting computer USB connector part Materialaluminum alloy A380,A360.ADC12,Zinc alloy 3 ... .As per the customer’s samplesSurface treatment1.sand blasting,2.power coating3.painting4.anodization5.electrophoresis6.zinc plating7.black oxidation. ...