PTFE Laminated Membrane Filters, 0.2 Micron, 47mm, 00/Pk R PTFE0 PTFE Laminated Membrane Filters, 0.2 Micron, 47mm, 00/Pk. PTFE Laminated Membrane Filters, 0.20 micron, 47 mm, pack of 00. Hydrophobic, durable ePTFE laminated on to a polypropylene later. Ideal for venting, phase seperations, and aerosol sampling. SKU.