Medium thick. Ideal for use as wicks in protein or nucleic acid blotting to provide a uniform flow of buffer through the gel to the transfer membrane in a blotting sandwich. Also suitable for use in removing gels from glass supports. Made of high purity, 100% cotton fiber. Weight: 183 g/m2. Thickness: 0.35 mm. Flow Rate: 35 ml/min. Capillary Rise: 24 mm/min. Absorption speed 140 mm/30 min. Equivalent to Whatman 3 MM.