Syringe Filters: Amazon.com Sterile Syringe Filters PES 25 mm Diameter 0.22 um Pore Size Individually Packaged 10/pk by Biomed Scientific 4.5 out of 5 stars 65 Syringe Filters,Syringe Filter PTFE,13mm Diameter,0.22um Pore Size,Pack of 100,by Ks-Tek Hydrophobic and Hydrophilic Membrane | 0.45 Disc Membrane If your experiment requires solvent filtration, gas filtration, or venting, then a PTFE