A fairing that goes onto the fuel drain to smooth the airflow and eliminate vibration at the valve stem than can lead to premature o-ring failure. You get one for the right side and one for the left side. To instal, turn set screw ¼ turn after contact, no lock-tight required. If you choose to lock-tight use VC-3 which is approved for plastic. Do not use blue loctite or any loctite with acetone in it because it will damage the plastic.