ITEM NAME:5X(25T M3 Metal RC Servo Arm Horn for Futaba Savox Xcore HL HSP HD Power BlM7X5) 5X(25T M3 Metal RC Servo Arm Horn for Futaba Savox Xcore HL HSP HD Power BlM7X5) 5X(Material: CNC Aluminum. Adjustable type servo arm. 25T Spine for Futaba and Power HD Servos. Includes two steel bolts to secure the split-clamp onto the servo output. M3 threads for your car or helicopter joints. Hole centers at 20 and 24mm from the servo output. Color: Blue Item size: 35 * 15 * 6mm / 1.4 * 0.6 * 0.2in Package List:1 x 25T M3 Metal RC Servo Arm Horn Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.).25T Spine for Futaba and Power HD Servos. Adjustable type servo arm. Includes two steel bolts to secure the split-clamp onto the servo output. Hole centers at 20 and 24mm from the servo output.