Sterile Syringe Filters PVDF 25 mm Diameter 0.45 um Pore Size Individually Packaged 10/pk by Biomed Scientific 4.5 out of 5 stars 80 $12.99 Syringe Filter Sterile PES, 33mm Membrane Diameter 0.22um Pore Size, High Throughput Hydrophilic Lab Filtration