Acrodisc, Syringe Filter with Glass PreFilter, Nylon, 25 mm, 0.45 µm, Aqueous, 50/pkg. Part Number: WAT200800. This nylon membrane works well with both aqueous and organic solvents. Acrodisc, Syringe Filter with Glass PreFilter, Nylon, 25 mm, 0.45 µm, Aqueous, 50/pkg. Part Number: WAT200800.