-No Superior Designs RC Losi Mini-B and Mini-T Aluminum Micro Servo Horn. CNC-machined from extremely lightweight and rigid aluminum, this optional servo horn is intended for the Mini-B and Mini-T equipped with the EcoPower WP173 or RS100 micro servos or any other compatible micro servos to provide a sharper and more responsive steering feel!Includes:(1) Aluminum Micro Servo Horn(1) Cap Head Screw