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Whatman 1093-935 Quantitative Filter Paper Sheet, 10 Micron, 7 s/100mL/in Flow Rate, Grade 93, 610mm Length x 610mm Width (Pack of 500): Science Lab Quantitative Filter Paper: Amazon.com: Industrial & Scientific
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Whatman 1093-110 Quantitative Filter Paper Circles, 10 Micron, 7 s/100mL/in Flow Rate, Grade 93, 110mm Diameter (Pack of 100): Science Lab Quantitative Filter Paper: Amazon.com: Industrial & Scientific
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Whatman® qualitative filter paper, Grade 113, creped circles, diam. 125 mm, pack of 100 | Sigma-Aldrich
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