Dec 13, 2021 · Titan3™ PTFE (Hydrophobic) Syringe Filters Titan3 PTFE (Hydrophobic) Syringe Filter 0.2 µm, 30 mm, with Pre-Filter, 100 Pk. Titan3 Polypropylene Syringe Filter Housings Meet The Requirements of 21 CFR 177.1520. Membrane: HPLC Certified PTFE, with Polypropylene Support . Titan3 PTFE (Hydrophobic) Syringe Filter 0.45 µm, 4 mm, 100 Pk.