... carbon, high tensile and alloy washer,fibre washer, black colour is also available. DIN7603 Fibre Washer:1, Over 15years manufacturer and export ... ; 4,Working process include: cold punching, and machining, also CNC machine, can do OEM order. 5, Full sizes available to include ... ; 6, ISO management. 7, Also available in black colour. DIN7603 Fibre Washer