... Quality 4.Can to be Customized. nickel plating outer profile washers1) Standard: DIN, BS, ... etc.4) Finish: Zinc Clear, Zinc Yellow, Black, Nickel-plating, Tin-plating, Chrome- plating, Dacromet,Mechanical Galvanizing, Hot ... -dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or ...