Yeah Racing Aluminum 7075 Fan Mount for 540 Motor Black #YA-0523BK
Fan mount for keeping your motor cool! Features a wire hiding clamp, where you can neatly tuck your fan wire underneath and can prevent it from catching onto moving parts! Able to fit either 30 or 40mm fans! A setscrew at the top allows you to tighten the clamp which prevents it from moving when you have set it at your desired angle.