Make offer. - NEW 25mm, 1.2um Glass Fiber Syringe Filters (Pack of 100) 100PCS Nylon Syringe Filter 0.22μm Pore size, 25mm Diameter, Prefilter Lab HPLC. £33.34. Free postage. Make offer. - 100PCS Nylon Syringe Filter 0.22μm Pore size, 25mm Diameter, Prefilter Lab HPLC. PTFE Syringe Filter,25mm/0.2u, 100/PK, LY-1017. £35.71.