... C pH range 0-14 pressure, vacuum to 210 kg/sq Expanded PTFE sheet is made of 100% P.T.F ... free * Meets FDA requirements * Service pressure, vacuum to 210 kg/sq.cm (3,000 psi) * Service temperature, - 250 to + 250C, short ... load to seal * Can seal rough or damaged flanges. lower price expanded PTFE sheet