Acrodisc Syringe Filters with GHP Membrane, Pore Size 0.45 um . Solvent Waste Systems. Pall® 4558 Acrodisc Syringe Filters with GHP Membrane, Pore Size 0.45 µm, Diameter 25 mm, Pack of 1000 Maximum Operating Temperature ... Nylon Syringe Filters, Sterlitech, 0.45 Micron, 25mm, 100/Pk - 14