Silicone O ring for waterproof or oil sealm or gas seal ring 1.Material:Silicon,Rubber 2. ... ROHS directive 3.OEM service Silicone O ring for waterproof/ oil seal ring/ gas seal ring1.Material: Silicon, 2.Meet ROHS ... -90 shore A or IRHD.4. Performance: high temperature resistant, oil resistant, weather resistant, anti-oxidation, resistant to flexural deformation, etc ...