Uses existing port in carburetor for the natural gas inlet. No permanent modification required, retain the ability to run gasoline To switch back to propane, re-connect the stock propane hose APPLICATION: LOW PRESSURE NATURAL GAS CONVERSION Compatible with DUROMAX XP12000EH Required inlet pressure 9-13.8"wc Package includes: 1PCS Natural Gas Conversion Kit as Picture shows Uses existing port in carburetor for the natural gas inlet