Torq Servo Arm giving the distance of 15/18/21mm from servo spline center hole. Please note that this Servo Arm can not be used with MKS X8 Servo (HBL850/880) Includes: - Carbon Plastic Servo Arm x 4pcs Use for: All Standard and Mini Servos using Futaba gear type, such as: - Torq Servo - KST Servo - Futaba servo - XPert Servo - MKS servo - BK servo - Align servo
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