EXTENDED RUN FUEL GAS CAP FITS HONDA Eu2000i GENERATOR Use this gas cap to extend the range of your generator with a external tank. Knurled for easy grip when opening or closing. CNC machined from a solid piece of HIGH QUALITY 6061 T6 ALUMINUM. The cap has a 1/4" female thread inside. Use a 1/4" brass male fitting with a hose barb that screws into the cap Made in the USA.