0.22 μm Pore Syringe Filters for sale – eBay 100pcs PES Syringe Filter 13mm 25mm Diameter, 0.45 um 0.22 μm Pore Size HPLC Lab 10PCS PTFE Membrane HPLC Syringe Filter 25mm 0.22um Hydrophobic Hydrophilic PTFE Syringe Filters 13mm Diameter 0.22μm Pore Size