... & 14001 3. High Quality 4.Can to be Customized. nickel plating outer profile washers1) Standard: DIN, BS, IFI, JIS, ISO,GB ... , etc.4) Finish: Zinc Clear, Zinc Yellow, Black, Nickel-plating, Tin-plating, Chrome- plating, Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round ...