PTFE Laminated Membrane Filters, 0.2 Micron, 142mm, 25/Pk. PTFE Laminated Membrane Filters, 0.20 micron, 142 mm, pack of 25. Hydrophobic, durable ePTFE laminated on to a polypropylene later. Ideal for venting, phase seperations, and aerosol sampling. SKU.