1940-49 Hose Conversion Adapter Kit Fitting Set used when changing gas lines from regular iron pipe gas hoses to rubber hoses. Set includes fitting on the right tank, left banjo and shut-off fittings. Compatible hose size is 1/4 inch (about 6 mm). The conversion fitting on the linker side is purchased separately. Chrome plated finish for Fuel line fits Fat Bob tanks/gas valves 1940-1949 chrome-plated connection thread: 7/16"-20 + 7/16"-20 USA Conversion kits for original Fat Bob tanks with push-pull gas valves of the 1940-1965 model years. Can replace the stock fuel lines with rubber or braided steel se. After installation you can Fit 1/4" ID rubber hoses between the tanks and to the bottom seat of the fuel valve. A fitting for the carburetor is not included and must be ordered separately.