Pricing. HAWP04700. MF-Millipore ® Membrane Filter, 0.45 µm pore size, 47 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic, white, 100 discs. 0.45 μm pore size. 79 % porosity. Expand. HVLP04700. Durapore ® Membrane Filter, 0.45 µm, 0.45 µm pore size, hydrophilic PVDF, 47 mm membrane. 0.45 μm pore size.