This will be the best $6 you can ever spend on your copter, period!
Not only will it protect your expensive motors and carbon arms during those inevitable nasty crashes, the soft TPU material is also excellent at dampening excessive vibrations and noises that plagues a lot of gyros. No more random yaw twitches! You'll even notice a smoother video feed due to less physical vibration and electric noise. Again, what other $6 investment can do this much for your copter?
Fits 22xx and 23xx class motors. Add the optional titanium alloy screws for even more Indestructibility!