Millex-GP Filter, 0.22 µm, PES 33 mm, non-sterile 0.22 µm pore size, 33 mm diameter, Millex-GP PES Millipore Express® membrane, hydrophilic View Price and Availability CLS431224 Corning® syringe filters Nylon membrane, diam. 25 mm, pore size 0.2 μm View Price and Availability Millipore SLCR033 MILLEX®-LCR Syringe Filter