MF-Millipore ® Membrane Filter, 0.65 µm pore size, 25 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic, white, 100 discs 0.65 μm pore size 81 % porosity Expand HAWP02400 MF-Millipore ® Membrane Filter, 0.45 µm pore size, 24 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic, white, 100 discs 0.45 μm pore size