Features: 100% new high quality gearbox assembly. Professional manufacturing, stable performance, high reliability and practicality. Fine workmanship can directly replace broken or old parts. Replace OEM Parts: 4137 640 0100 This product is suitable for Stihl FS120 FS200 FS250. Specifications: Condition: 100% New Material: Metal Replace Parts OEM: 4137 640 0100 Fitment: Fit for Stihl FS44, FS65, FS72, FS74, FS75, FS76, FS80, FS80R, FS83, FS83T, FS85, FS85R, FS85T, FS85RX, FR85T, FR85, FS87, FS87R, FS90, FS90R, FS100, FS100R, FS100X, FS100RX, FT100, FS120, FS120R, FR130T, FS130R, FS200, FS200R, FR220, FS240C , FS240RC, FS250, FS250R, FS260C, FS260RC, FR350, FS460C FR480 Size: Length: approx. 17.5cm / 6.9in Head Diameter: Approx. 6.7 cm / 2.6 inch Package List: 1 * Gearbox Assembly Note: 1.Please allow 0-1 inch error due to manual measurement. Thank you for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real standard.