It is a braided packing made of carbhonliber which is imprenated with PTFE dispersion,it is inert to almst all corrosive chemicals,when it is used for pumps,frictional heat is freely conducted to the stuffing box metal because of its excellent thermal conductivity,andt thus no damage will be caused to the packing, it can replace PFE asbestos packing withinwide service range, it can be used to seal corrosive fluids except strong oxidizer acids, organic solvents,fluids where contamination is not permissible for centrifugal pumps,plunger pumps,mixers valver,etc.