It is a braided packing made of PTFE yarn containing graphite. It is recommended for shafts for almost all chemical. Stability and long service lift are achieved bu low friction coefficient. It has great tear strength and high thermal conductivity. This self-lubrication packing does not score the shaft and minimizes sleeve replacement cost. It can be used to seal alkalies,solvents,water,steam,acids except strong oxidizing acids(aqua Regina,fuming citric acid,fuming sulfuric acid,etc.) for centrifugal pumps,autoclaves,agitators,mixers,etc.