Quick Disconnect Fuel Coupling with dual shutoff in 1/4" or 5/16". When connected fuel will flow & when disconnected fuel will not flow from either side. Use Dual shut-off for fuel tanks equipped with a cross-over line. Capable of withstanding temperatures of -40 degrees F to 180 degrees F. These quick disconnect fittings utilize Nitrile (Buna N) o-rings and may not be compatible with some race fuels. Made in the U.S.A. Choose size and click add to cart. We recommend keeping as little slack as possible in the crossover line to keep the coupler up and away from the heat of the engine.