Corning® Bottle Top Vacuum Filter manufactured by Corning consists of low liquid retention funnel with filter membrane made of CA, PES or Nylon. Two neck sizes (33 mm and 45 mm) are available to fit most glass and plastic media storage bottles.
Corning® 500 mL Bottle Top Vacuum Filter, 0.45 µm Pore 33.2cm² CA Membrane, Fits 33 mm Diameter Necks, Sterile, 12/Case, Corning Inc. (CAT#: STEM-GLE-1654-LC)