... Standard:DIN,ISO,ANSI/ASTM,BS,JIS B Size:All sizes Material:mild steel,carbon steel,stainless steel,brass,copper,etcStandard ... :DIN,ISO,ANSI/ASTM,BS,JIS BSize:All sizes are availableFinish:Plain,zinc plated,chrome-plated,nickel-plated,dacrometPacking ... packing,also according to customers' requirement.WELCOME CUSTOMIZE DRAWING Flat washer