PTFE gasket including piston rings,guide rings,sealing washers,bearings bushes,guide strip,mechanical sealing ,etc, Porpery and Usage:PTFE (teflon ) gasket can be ... ,polyimde,carbon fiber,silica,polyser,etc.Usage:Electric insulation parts,sealing washer,anti-sticking materials,wire insulation sheath ,corrosive liquid dielectric ...