Gorilla PRO-grammable paddles for Trex 450. This paddle is designed with a new thicker airfoil for increases controllability of your helicopter. Adding in the weight provides more stability to your heli and calms down the twitchiness, this is usedul for both beginners and experienced 3D flyers alike. Take out the weight and the cyclic response is increased, many experienced flyers cut the weight in half for the perfect balance. This is a drop in replacement for the Belt CP, should fit the Belt Flybar with no modifications