33mm 0.22μm PTFE Syringe Filter for Filtration on Sale . 100PCS Lab Supplies PES Membrane Syringe Filter Sterile 33mm . Feb 11, 2021 · 100pcs PTFE Membrane Syringe Filter 25mm 0.22μm HPLC Non-sterilized Hydrophobic USD $42.22 Syringe Filter, Sterile Filter PES, 0.22 micron Pore Size, 33mm Diameter, 20pcs . Biomed Scientific Syringe Filters