Polyethersulfone (PES) UltraSep Membrane, 0.22µm, 47mm, 100/pk, White, Not griddedGVS UltraSep PES Membrane Filters; Polyethersulfone. 0.22µm, NON-STERILE, 47µm, Available in a range of pore sizes and disk and roll sizes. Features and Benefits Strong, microporous film asymmetric membrane is constructed from a high-temp