MF-Millipore® Membrane Filter, 0.22 µm pore size 25 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic, white, 100 discs Synonym (s): Cellulose nitrate membrane filter discs, Hydrophilic MCE membrane filter discs, Mixed Cellulose Ester membrane filter discs eCl@ss: 32031602 NACRES: NB.24