Model 100231. 6900/5500 Starting/Running watts with gasoline. Can run from gas or propane in factory state. I also have a Century Fuel Products natural gas conversion kit for it that comes with approx 17' of flexible Pro Flex Flak Jacket fuel line. In the pics you can also see the oil drain tube I added for much easier oil changes. Call, dont text, Shawn at two two five, three one five, eight eight zero nine.