Seal Washer: 1.Material:copper,steel,rubber 2,Temperature:-60 to 500C 3.Standard:JIS,UNI,DIN,ASTM,GB 4.Samples free Seal Washer :1. Material ... : NBR, SILICONE, VITON,HNBR, CR, PTFE, EPDM, etc. Can choose on your requirement; 2. types of Rubber Oil Seal ... size.5.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown ...