Replace OEM Part: 4137 640 0100, 4130 640 0100, 4130 641 0300, 4180 640 0114 Trimmer Gear Head Fits Models: Stihl FS25-4, FS65-4, FS36, FS40, FS44, FS72, FS74, FS75, FS76, FS80, FS80R, FS83, FS83T, FS85, FS85R, FS85T, FS87, FS87R, FS90, FS90R Trimmer Trimmer Gear Head Fits Models: Stihl FS94, FS94R, FS100, FS100R, FS100RX, FS110, FS110R, FS110X, FS110RX, FS120, FS120R, FS130, FS130R, FS200, FS200R, FS240, FS240R, FS250, FS250R, FS260, FS460, FR85, FR85T, FR130T, FR220, FR350, FR450, FR460, FR480, FS-KM, FT100 Trimmer Package Includes: 1X Gear Box Head Assembly 1X Spare mounting screws 1X nut 1X tool， Warm reminder: Please check the model number and pictures carefully to ensure that what you purchase is correct. If you are not sure, please contact us; We firmly believe that communication is a good way to solve problems. If you are not satisfied with this kit in any way, please feel free to contact us 4137 640 0100 Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS80 FS83 FS85 FS-KM Trimmer Gear Head