American Fabric Filters technical sales staff gets to choose from dozens of fabrics when they’re designing your liquid filters. We stock Nylon Monofilaments (NMO) from 45 to 2400 micron, Polyester Multifilament’s (PEMU) From 100 to 1500 micron as well as polyester & polypropylene felts from 1 to 200 micron. All of our liquid filtration felt material are available with a plain, singed/glazed or covered finish.