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Qualitative Filter Paper, Cellulose, Grade 4, 12.5cm Diameter, 20 to 25um Pore Size, PK 100 - Grainger
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Always in Stock - Whatman 1004-090 Qualitative Filter Papers; 9.0 cm dia; pore size, 20-25 µ; 100/box from Cole-Parmer
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No.4 Qualitative Filter Paper # 4 Whatman 03033825 - Specification: JIS standard: ─, domestic filter paper equivalent: No. 101, particle retention (μm): 20-25, thickness (μm): 0.21, ash (%): 0.06, weight (g /
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