Pall Acrodisc ptfe membrane filter 0.22 um online-PTFE Pall 4542 Acrodisc Syringe Filters with PTFE Membrane, Pore Pall 61638 Glass Fiber Membrane Filter, Type A/E, 1.0 um Pore Size, 8" x 10" Diameter $215.00 Simsii Syringe Filter, Nylon Membrane Lab Disc, Diameter 13 mm, Micron Pore Size 0.45 um, Pack of 100