Medium flow and nominal particle retention rating of 8 µm Herzberg filtration speed of 240 s Fluted (prepleated) for easy use with conical filter funnels Can be used for soil analysis or general filtration Compared with quadrantfolded filters, Cytiva's Whatman Grade 2V prefolded filter paper exposes extra surface area, which enables a higher loading capacity and shorter filtration time. Prefolded filters for seed and soil testing Grade 2V prefolded filter sheets are suitable for extracting samples from soil to support contaminant testing in the presence of weakly acidic solutions