Medium thick paper offers extremely high flow. Ideal for electrophoresis of large molecules and as a blotter to complete the blotting sandwich in gel transfer applications. Smooth, uniform texture ensures continuous contact of buffer from the chamber through the gel and transfer membrane to the opposite pole or weight. Made of high purity, 100% cotton fiber. Weight: 290 g/m2. Thickness: 0.83 mm. Flow rate: 180 ml/min. Capillary rise: 52 mm/min. Absorption speed: 220 mm/30 min. Equivalent to Whatman 31 ET CHR.