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Merck
Whatman® membrane filters mixed cellulose ester ME28, diam. 50 mm, pore size 1.2 μm

Whatman® mixed cellulose ester ME 28 filter discs 1.2 μm pore size

Whatman® membrane filters mixed cellulose ester ME28, diam. 50 mm, pore size 1.2 μm