1) High Quality Gasket 2) Resonable Price . 3) On Time Delivery We ... Series, ISO 361/1and Customized specificationCertificationISO9001-2008, TS16949, NSF, WRAS, UL, TZW, W270, ACS, FDAMaterial100% pure silicone o-ringMaterial usage is ... ourself.7) High and low temperature resistance, oil resistance, anti-ozone and aging, wearing Various sizes & colors as following: high quality automotive rubber ...