Du-Bro Large Scale Fueling Valve (Gas) Part No: 611. Du-Bro has taken innovation to its finest and produced a large scale fueling valve featuring a press on dust cover to keep dirt and oil from getting into the valve. Designed to work with 1/8"IDand 5/32" IDtubing. The Du-Bro Large Scale Fueling Valve allows a higher volume of fuel to enter the carburetor and fill your fuel tank faster. Comes complete with fueling probe. (Red Anodized Model is for GASOLINE ONLY). Recommended fuel tubing size is DU-BRO® Large(1/8" ID) or X-Large (5/32" ID) Silicone (Glo).