Part Number: 4180 640 0114 4180 640 0104 Warning!!! This Gear Head is fit for Straight Brushcutter,Please check size of of your original gear head, Drive tube,Drive Shaft and Deflector Before your Purchase. Size: Drive Tube Dia: 25.4mm Drive Shaft Spline: 5.25mm SquareCollar Nut: M10 x 1.0MM Left Hand Thread Fit For Stihl Brushcutter FS80 FS85 FS85R FS89 FS89R FS91 FS91R FS94 FS94C FS94RC FS111 FS111R FS111RX FS120 FS120 2-MIX FS120R FS120R 2-MIX Fit For Stihl Brushcutte FS131 FS131R FS235 FS235R FS240 FS240R FS240RC FS250 FS260R FS260RC FSA130 FSA130R FSA135 FSA135R FS-KM Packing Details: 1 * Gear Head High-Quality & Durable Replacement with Professional Manufactuing. Any Question within 24 Hours Response Service! Gear Head Fit For Stihl Brushcutter FS111 FS111R FS120 FS120R 2-MIX FS131 FS235 FS240 FS240RC FS250 FS260 FSA130 FAS135 FS-KM