Macherey-Nagel Filter Papers, round, grade MN 640 we, 240 mm, 100 pcs.

Basis weight: 85 g/m2. Thickness: 0.22 mm. Filtration speed: 5 s/10 ml. Smooth. Ash free, fast filtering, for coarse precipitates. MN 640 we is the fastest quantitative filter paper with highest flow rate. It is used for example in analytical procedures of samples with coarse or gelatinous particles.