AAWP04700. MF-Millipore ® Membrane Filter, 0.8 µm pore size, 47 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic, white, 100 discs. 0.8 μm pore size. 82 % porosity. Expand. GTTP02500. Isopore Membrane Filter, 0.2 µm pore size, hydrophilic polycarbonate membrane, 25 mm diameter. 0.22 μm pore size.