MF-Millipore™ mixed cellulose esters (MCE) membrane filter discs, produced from biologically inert cellulose acetate and cellulose nitrate, are a versatile choice for biological, analytical, and environmental monitoring as well as research applications. With a consistent thickness, uniform pore structure, and smoother surface than pure nitrocellulose membranes, hydrophilic MF-Millipore™ membranes are available in a variety of pore sizes, colors, surfaces, and diameters.