Extreme Flight
EFSA15HM3B
Extreme Flight ALU Servo Arm - 1.5" - Tapped M3 - Hitec (24T) - Black
Note: most Hitec servos (HS-xxxx series) have 24T. However, the newer Hitec D-series (Dxxxx) have 25T, as well as HSB-xxxx series ! Make sure to double check on the servo specifications page which type of servo arm is required.