... physical property, oil resistance, high temperature stability, etc. Made with all kinds of rubber. 1. Material: NBR, SILICONE, VITON,HNBR, CR ... size.5.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown ... .Hardness: 90-95 ShoreWelcome to contact us for detailed information. mechanical seal,o ring,double acting piston ...