This is a 47 Durapore Hydrophobic PVDF membrane with a 0.22 µm pore size that provides high flow rates & throughput, low extractables & broad chemical compatibility. Physicochemical Information: Refractive Index 1.42 Pore Size (µm) 0.22 Air Flow Rate, L/min x cm² 16 Bubble Point at 23 °C ?1.24 bar, air with methanol Gravimetric Extractables (%) 0.5 Porosity % 75 Water Flow Rate, mL/min x cm² > 1 Protein Binding (µg/cm²) 150 Dimensions Filter Surface Plain Thickness, µm 125 Filter Diameter (mm) 47