CHRISTO-LUBE® MCG 117 Instrument Grease is a fully fluorinated grease thickened with PTFE which operates under extreme temperature conditions, has outstanding stability with oxygen and excellent compatibility with metals, plastics and elastomers. This wide temperature (65°C to 250°C), extremely inert fluorinated lubricant is used in vacuum systems where pressures may be as low as 10-12 Torr