Filter Cloth is a special type of wire cloth woven with a greater number of wires in one direction than the other, and utilizing two different wire diameters (also referred to as Dutch Weave). Absolute Filter Rating is a measurement (in microns) of the largest, hard spherical particle that can pass through a specific screen under certain test conditions, usually a bubble point test. Here is a list of common Filter Cloth mesh counts and other specifications:

Filter Cloth Specification Table