nickel plating outer profile washers 1.Size: M3 ~ M64 2.ISO9001 & 14001 3. High ... Quality 4.Can to be Customized. nickel plating outer profile washers1) Standard: DIN, BS, IFI, JIS, ISO,GB,ANSI,ASME ... , etc.4) Finish: Zinc Clear, Zinc Yellow, Black, Nickel-plating, Tin-plating, Chrome- plating, Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc ...