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Sartorius 11406-47-ACN Membrane Filter Disc, Cellulose Nitrate, Sterile, 0.45 μm, 47mm, White with Black Grids (Pack of 100): Amazon.com: Industrial & Scientific
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Nitrocellulose membrane filter, black, white grid, Ø 47 mm, pore size 0.45 µm,sterile, pack of 100 pieces, LABSOLUTE®, Art. No. 7699940 < Filter paper | Analytika
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