Single or dual shut-off valves from Motion Pro. When connected fuel will flow and when disconnected fuel will not flow. Use dual shut-off for fuel tanks equipped with a crossover line. For fuel supply (fuel tank to carburetor), use the original quick-disconnect couplings with the single shut-off valve. Available for 1/4" and 5/16" i.d. fuel line. Capable of withstanding temperatures of -40°F to 180°F. Made in the U.S.A.