Due to the original factory servo protective cover being easily broken, which affects the internal gear damage, GPM Racing developed the aluminum 7075 servo protective cover which is more durable than the original nylon part. Instead of taking the risk to change the whole servo and cost you a lot, our alloy 7075 servo shell can provide better protection. This essential component is a must-have valued upgrade suitable for 2085, 2085X, 2085R, 2090 servos.