REPLACE OEM PART：25-2 trimmer head for 25-2, 4002 710 2108, 4002 710 2191 FITMENT：Stihl autocut 25-2 trimmer head for FS44, FS55, FS55R, FS56 (From 2008 On), FS56RC, FS70, FS70R, FS80 (From 1996 On), FS80R, FS83, FS85, FS85R, FR85, FR85T, FR106, FR108, FR130T, FR220, FR350, FR410, FR450, FR460, FR480, KM55, KM85, KM90, KM110, KM120, KM130, FS-KM FITMENT：Stihl trimmer head for FS44, FS55, FS55R, FS56 (2008 On), FS56RC, FS70, FS70R, FS74, FS76, FS80 (1996 On), FS80R, FS83, FS85, FS85R, FS87, FS87R, FS90 (2005 On), FS90R, FS91, FS91R, FS94, FS94R, FS100, FS100RX, FS110, FS111RX, FS120, FS130, FS130R, FS131, FS131R, FS200 (1997 On), FS240, FS250, FS260R, FS460R (2011 On) 25-2 TRIMMER HEAD：Bump and feed, where the nylon line length is automatically adjusted by tapping the cutting head against the ground. It is suitable for backpack brushcutters, standard brushcutters, clearing saws, electric trimmers, as well as Kombi engines and Kombi tools PACKAGING & EASY INSTALLATION：stihl fs90r trimmer head size 10mm x 1.0 LHF. Engineered to replace part 4002 710 2191, weed eater head fits seamlessly with factory specifications, ensuring a snug, vibration-free connection High-Performance Trimmer Heads & Accessories – Universal Fit for Stihl, EGO & More Upgrade your outdoor tools with our premium trimmers, engineered for durability and compatibility. Perfect for Stihl (FS56, FS90R, etc.), EGO, and most string trimmers/weed eaters, our heads deliver precision and ease. Universal Compatibility Fits Stihl, EGO, and major models. Features 25-2 trimmer head and auto-cut technology for seamless integration, ideal for bump feed systems and standard 1.5"-2" mounts. Durable & Efficient Built with heavy-duty materials to withstand tough use. Bump feed design ensures easy line advancement; auto-cut systems offer clean, consistent cuts in dense vegetation. Lightweight for reduced fatigue. Easy Install & Maintain Quick tool-free installation. Protective film keeps it new; minimal maintenance for hassle-free use. Trusted by pros and DIYers Upgrade today for reliable, high-performance trimming.