Petcock / Fuel Valve. The Nihilo Concepts Petcock is a direct replacement for the older style screw type that has come on many KTM, Husqvarna, and Gas Gas 50's and 65's, and Adventure cross-over bikes for many years. It works like the standard lever turn style petcocks many have used for many years and eliminates the possibility of dirt and water from jamming up your stock unit. Made in the U.S.A. out of aircraft-grade billet aluminum and fifth-axis CNC machined to perfection with heavy duty gasket and hardware, the Nihilo Concepts Petcock will last for many years. If you have ever struggled with the old screw-type petcocks, grab a Nihilo Petcock today. Note: Does NOT include new O-ring.