... & 14001 3. High Quality 4.Can to be Customized. nickel plating outer profile washers1) Standard: DIN, BS, IFI, ... Steel, Alloy Steel, Stainless Steel, Brass, Aluminum, etc.4) Finish: Zinc Clear, Zinc Yellow, Black, Nickel-plating, Tin-plating, Chrome- plating ... Finished: White Zine, Black Zine, Blue Zine, Yellow Zine, Chrome, Nickel, Brass, Trivalent Chromium White Zinc, Trivalent Chrominum Color Zinc ...