Nylon monofilament or nylon monofilament (NMO). NMO nylon monofilament filter bag is the use of surface filtration principle, will be larger than its mesh particles interception and isolation. The undeformed monofilament wire is woven into the net according to the specific pattern, and the junction of the silk wire is welded tightly to increase the strength, so that the filtration level can reach absolute accuracy. The filter bag has the advantages of high passability, suitable for large filter impurities or pre-filtration, coarse filtration and other filter precision requirements are not high occasions.