Twenty Four New Aftermarket Replacement Poly Blades compatible with Stihl Trimmer Head Models: 5-3, 6-3, 20-3, 41-3. These Trimmer Heads fit the Following Trimmers: FS36, FS40, FS44, FS45, FS46, FS55, FS75, FS80, FS83, FS85, FS90, FS100, FS100RX, FS110, FS130, FS250, FS310, FS350, FS360 (from 2011 on), FS450, FS460, FS550, KM55, KM85, KM90, KM110, KM130, FS-KM. Also Fits Husqvarna Trimmers. All OEM part numbers and logos are to be used for identification purposes only