MILLEX ® -LCR Syringe Filter, 0.45 μm Hydrophilic PTFE, 33 mm, Nonsterile 0.45 μm pore size SLFG050 Millex-FG, 0.20 µm, hydrophobic PTFE, 50 mm, A 50 mm diameter non-sterile syringe filter with a 0.2 µm pore size hydrophobic PTFE membrane. Comes in a pack of 10. 0.2 μm pore size SLFG025LS