O Ring 1/8'' x 4 1/8'' (BS243) 70 ShoreS.1947https://22df4504011deb964a17-39bee0485bf754a0e77a8d4deb668d89.ssl.cf4.rackcdn.com/imagelibrary_sml/1947_pic1.jpgSparexMaterial: Nitrile Rubber 70° shore hardness. For general use at temperatures: -40°C to +135°C.PTO ShieldS.41991https://22df4504011deb964a17-39bee0485bf754a0e77a8d4deb668d89.ssl.cf4.rackcdn.com/imagelibrary_sml/41991_pic1.jpgSparexP.T.O. ShieldS.1947, S.41991