I. Definition:
it is a kind of packing made of graphite PTFE wire which is made of PTFE fiber with graphite powder and certain thermostable lubricant.

II. Features:
1. low coefficient of friction: the packing has well stability and ling service life
2. The packing has well heat conductivity and tensile strength
3. The packing has excellent self-lubrication: it will not damage the axostyle。