Syringe Filters, PES, Hydrofilic,Diameter 25mm, Pore Size 0.45um,10pcs Syringe Filter,PES Membrane 0.22um Pore Size, 33mm Membrane Diameter 25mm Organic Hydrophobic PVDF Welding Filter, Pore Size 0.22um PTFE Membrane Diameter 25mm,Pore Size 0.22um,Organic, Hydrophobic,10pcs Diameter 25mm 25mm 33mm 25mm 25mm Pore size 0.22um 0.45um