Fuel Line, Ano-Tuff, braided nylon, rubber, aluminum, Holley 4150, -8 AN, 7/8" -20 thread. Earl’s fuel kits are offered in MIL SPEC TYPE III hard anodizing, “Ano-Tuff” (AT) for superior wear and corrosion resistance. Bowl fittings are contoured for improved flow. Has a -8 threaded opening on both ends for applications where a pressure gauge is desired in the line.