"Form This specification covers a fluorosilicone (FVMQ) rubber in the form of molded rings. Application This product has been typically used from -67 to +347 ??(-55 to +175 ?? in fuels and from -67 to +302 ??(-55 to +150 ?? in lubricating oils. This product is not recommended for use in most synthetic turbine lubricants@ particularly high temperature stabilized@ ""HTS""@ engine oils (those conforming to MIL-PRF-23699 Class HTS@ MIL-PRF- 7808 Grade 4 and AS5780 Class HPC). The cross-section of such rings is usually not over 0.275 inch (6.98 mm) in diameter or thickness@ but usage is not limited to such applications. Safety - Hazardous Materials While the materials@ methods@ applications and processes described or referenced in this specification may involve the use of hazardous materials@ this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved."