Braided with PTFE filament which is impregnated piece by piece with PTFE dispersion. Flexibility, almost complete Chemical inertia, dimensional stability, low friction coefficient to compression, and excellent resistance to compression are qualities classifying this packing among the best ones available in the industrial field. It is suitable for all the chemical compounds (excepting cast alkaline metals and the gaseous fluorine), alternative and rotary motions shafts operating at high peripheral speed, rod, pistons, valve stems, expansion joints, etc.