Millipore Express PLUS Membrane Filter, 0.22 µm pore size, hydrophilic polyethersulfone, 47 mm idiameter Expand DAWP02500 MF-Millipore ® Membrane Filter, 0.65 µm pore size, 25 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic, white, 100 discs Expand LSWP04700 Mitex ™ Membrane Filter, 5.0 µm pore size, hydrophobic PTFE, 47 mm Expand