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A chemical filtration device (usually a membrane or layer) is designed to physically block certain solids or substances while letting others through, depending on their physical size. Filters are typically used to remove solid residue (filtrand) suspended in liquids (filtrate). Spectrum offers a variety of types and sizes, and accessories. For the best selection of chemical filtration devices Spectrum has you covered, with categories including membranes, microfiltration, media filters, syringe filters, pre-filters, vacuum filtration and more. For Dialysis, Spectrum offers closures, dialyzers, glass weights, membranes, and microdialyzers. Our selection of filter holders, filter paper, adapters and funnels will ensure that you have everything your lab needs for its filtration needs.