Filtration membrane discs are thin, precut membrane rounds designed for high-throughput, and fast filtration of liquid and gas samples in air monitoring and analytical research. Choose from gridded and non-gridded discs, as well as a variety of materials including mixed cellulose ester, polycarbonate, PTFE, nylon and PVDF. Rely on Thermo Scientific™ Nalgene™ Membrane and Prefilter Disks to meet a wide range of laboratory filtration needs.