Replace OEM Part: 4137 640 0100, 4130 640 0100, 4130 641 0300 Aluminum alloy body, sturdy structure, stable working performance, corrosion-resistant Light weight, easy to install, flexible for changing mowing blades and trimmer heads, the best alternative to trimmer gearboxes 10 teeth, 1 in/25.4 mm diameter shaft, square attachment holes, fits most straight shaft trimmers Compatible with Stihl FS36, FS40, FS44,FS100, FS100R, FS100X, FS100RX, FS110, FS110R, FS110X, FS110RX, FS120, FS120R, FS130, FS130R, FS200, FS200R, FS240, FS240R, FS250, FS250R, FS260, FS260C, FS260RC, FS460C, FS460RC, FS480, FS480C, FR85, FR85T, FR130T, FR220, FR350, FR450, FR460, FR480, FT100, FS-KM Gearbox come with mounting screws to attach it to the trimmer

Material: Metal
Color: Silver
Size: 75x155mm(3x6 inch)

Package include:
1 x Trimmer Gearbox Assembly
2 x Mounting screws