13mm 0.22um/0.45um Nylon Membrane Syringe Filters, Organic Solution Filtration Membran Laboratory Supplies Filters, 100 PCS/PK. Whatman 9910-1302 Syringe Filter, 13mm, 0.22um, Nylon, pack/500. Whatman 9910-1302 Syringe Filter, 13mm, 0.22um, Nylon, pack/500. 10-100PCS (NY)Nylon Syringe Filter 13mm 0.45μm Pore Size Non