Teflo Membrane: TF (PTFE) Membrane: Filter Media/Support: PTFE with PMP (polymethyl-pentene) support ring: PTFE on a polypropylene support: Typical Thickness: 1 μm: 76 μm (3 mils) 2 μm: 46 μm (1.8 mils) 3 μm: 30.4 μm (1.2 mils) 0.2 μm: 139 μm (5.5 mils) 0.45 and 1 μm: 135 μm (5.3 mils) Typical Air Flow Rate L/min/cm2 at 0.7 bar (70