1) Material: silicone, neoprene, nitrile, EPDM, SBR, Viton, HNBR, NR 2) Durometer: 45-90 Neoprene Gaske/Rubber Gasket/ ... /Rubber Gasket/Rubber Washer2.Material: silicone, neoprene, nitrile, EPDM, SBR, Viton, HNBR, NR3.Durometer: 45-90 shore A4.Dimensions: 3mm to ...