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Membrane filters millipore S-pak type HA, 47 mm, 0.45 um pore size, pk/600
For membrane filtration in microbiological analysis of aqueous samples. "HA" signifies certified compliance with Standard Methods criteria with pore size of 0.45 um. White, cellulose and mixed-ester composition. S-Pak (filter only) is sterile. Diameter: 4