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Quick view Whatman Whatman Qualitative Filter Papers, Grade 1 circles, 55 mm, 100/pk Retail Price: Was: Your Price: $23.95
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Quick view Whatman Whatman Qualitative Filter Papers, Grade 2 Circles, 55 mm, 100/pk Retail Price: Was: Your Price: $25.95
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Description Features of the Whatman Qualitative Filter Papers: Used in air-pollution monitoring and routine cleanup of biological fluids. Retains coarse particles, gelatinous precipitates. Particle Retention: > 20-25µm. Porosity: Coarse. Filtration speed: ASTM*, 12 sec.; Herzberg, 37 sec. Surface: smooth.