2PCS 25-2 Trimmer Head, Thread size: 10mm x 1.0 LHF, Uses .080, .095, or .105 trimmer line 25-2 Bump Feed Trimmer Head Perfect Replace 4002 710 2191, 4002 710 2108, 4002 710 2168 Fits: FS44, FS55, FS55R, FS56 (2008 On), FS56RC, FS70, FS70R, FS74, FS76, FS80 (1996 On), FS80R, FS83, FS85, FS85R, FS87, FS87R, FS90 (2005 On) Fits：FS90R, FS91, FS91R, FS94, FS94R, FS100, FS100RX, FS110, FS111RX, FS120, FS130, FS130R, FS131, FS131R, FS200 (1997 On), FS240, FS250, FS260R, FS460R (2011 On) Fits : FR85, FR85T, FR106, FR108, FR130T, FR220, FR350, FR410, FR450, FR460, FR480, FSA90R, FSA130R, FSA135, FSA135R, Fits : KM55, KM56, KM85, KM90, KM94, KM100, KM110, KM120, KM130, KA85, KA85R, KR85, FS-KM 25-2 Trimmer Head Replaces Number: 4002 710 2191, 4002 710 2108, 4002 710 2168, 25-2 Fits For Stihl: FS44, FS55, FS55R, FS56 (From 2008), FS56RC, FS56RCE, FS70, FS70R, FS74, FS76, FS80 (From 1996), FS80R, FS83, FS85, FS85R, FS87, FS90 (From 2005), FS90R, FS91, FS91R, FS94, FS94R, FS100, FS100RX, FS110, FS111R, FS111RX, FS120, FS130, FS130R, FS131, FS131R, FS200 (From 1997), FS240, FS250, FS260R, FS460R (From 2011) Fits For Stihl: FR85, FR85T, FR106, FR108, FR130T, FR220, FR350, FR410, FR450, FR460, FR480, FSA90R, FSA130R, FSA135, FSA135R, KM55, KM56, KM85, KM90, KM94, KM100, KM110, KM120, KM130, KA85, KA85R, KR85, FS-KM Safe and Reliable Made of high quality plastic, without the dangers associated with metal products, greatly enhancing your personal safety. weed eater is stable, long-lasting and will fit well with your String Trimmer. Installation and Use Align the slot and rotate the weed eater head to lock it, you can start to use it. When you start to rotate, the length of the weed eater string is too short, you can lengthen it by the middle button.