Whatman Cyclopore membrane filters have precise pore sizes and feature the unique characteristics of track-etched membranes, i.e. sharp cut-off and reproducible filtration performance. The smooth, flat membranes ensure that particles are retained on the surface, making them easy to see under the microscope. Features Low affinity for stains provides higher optical contrast and makes them easy to see under the microscope. True surface capture enables easy examination of samples and short analysis times. Fully transparent membranes allow absorption and adsorption of filtrate, non-hygroscopic Low tare weight No particle separation provides ultra-clean filtrate Biologically inert. The certificate can be found here: https://www.cytivalifesciences.com/en/de/support/quality/certificatesMeer tonenMinder tonen