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S-Pak® Membrane Filter mixed cellulose esters (MCE), pore size 0.45 μm, filter diam. 47 mm, white gridded membranes for microbiological analysis | Sigma-Aldrich
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SimPure MCE Gridded Membrane Filter Sterile, 47mm Diameter and 0.45um Pore Size, Individual Pack Membrane Disc Filter, Hydrophilic Filter Paper, Pack of 100: Amazon.com: Industrial & Scientific
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