EZ-Pak® Membrane Filter mixed cellulose esters (MCE), pore size 0.22 μm, filter diam. 47 mm, gridded white filter, suitable for bioburden testing, input: bottled water, beverage(s); Synonyms: Semi-permeable membranes,Membrane filters; find Millipore-EZGSWG474 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich