Corning Life SciencesCorning ® 500 mL Bottle Top Vacuum Filter, 0.22 µm Pore 33.2cm 2 PES Membrane, Fits 45mm Diameter Necks, Sterile, 12/Case Fits plastic or glass media bottles with 45mm neck sizes. Polyethersulfone (PES) membranes provide the fastest fl... Read more...