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25mm diameter Cyclopore membranes by Whatman are manufactured using proprietary technology to produce a precision membrane filter with a closely controlled pore size distribution. Cyclopore membranes are true pore size microporous membranes featuring sharp cut off and reproducible microfiltration performance characteristic of track-etched membranes. The smooth flat membrane ensures particles are retained on the surface so that they are easily visible under a microscope. Membranes are produced from a pure polymeric film and give exceptional chemical cleanliness. They are free of contaminants, have low tare weight, minimum water adsorption and very low levels of non-specific protein binding. These polycarbonate membranes are hydrophilic and are available in a choice of diameters and pore sizes. 100/Pack. Whatman #: 7060-4714