EcoPower WP-320T Aluminum Clamping Servo Horn. Constructed from top-quality CNC-machined aluminum and anodized black for added durability with a clamping style design that provides a supremely secure fit. This EcoPower horn is the ultimate upgrade for your 1/16 Traxxas platforms such as the 1/16 E-Revo equipped with the EcoPower ECP-320T mini servo or any other compatible micro servos with 25T spline!