membrane materials. Specifications Description Zefluor™ MembraneTeflo Membrane Zylon™ Membrane TF (PTFE) Membrane Filter Media/Support PTFE with PTFE support PTFE with PMP (polymethyl-pentene) support ring Unsupported PTFE PTFE on a polypropylene support Typical Thickness 0.5 µm: 178 µm (7 mils) 1 µm: 165 µm (6.5 mils) 2 and 3 µm: 152