Sep 28, 2021 · Corning® 50 mm Diameter Syringe Filters, 0.2 µm Pore PTFE Membrane, Sterile, Individually Packaged, 12/Case. Product Number 431227. E-mail Print. prev. next. Quality Certificate. These Corning® syringe filters have polypropylene copolymer housings, hose barb inlets and hose barb outlets. PTFE membranes provide the best chemical resistance.