It is a high-quality braided packing made of PTFE yarns fiber with incorporated graphite and the reinforced corner yarns of Aramid fiber. It can prevent gap from extrusions in the presence of high pressure and temperature. It has good sliding velocity and thermal conductivity. It enables to seal high pressure piston pump during a long running period. It can be used seal water,hot water,oils,Greases,weak acids and alkaline solutions,abrasive medium.