... resistance 3.good flexibility, good elasticity 4.Anti- window rubber seal 1.Materials: NBR, NR ,EPDM ,SBR ,SR ,CR ,Silicon, etc. 2 ... your size.5.Optional color for you of the Oil Seal,Rubber Oil Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown ... , auto and motorcycle parts, oil drilling and mining rubber parts and other rubber products. The material of these products are NBR, NR, EPDM ...