Membrane: HPLC Certified PTFE, with Polypropylene Support . Description. Titan3 PTFE (Hydrophobic) Syringe Filter 0.2 µm, 17 mm, 200 Pk. Material. PTFE (Hydrophobic) Pore Size. 0.2 μm. For Use With (Application) Sample Filtration: aggressive organic, highly basic, or hot solutions, transducer protectors; aqueous solutions after prewetting