The Best, Winco Multi-Fuel Portable Generators a sustainable option to the everyday gasoline engine generator. These portable tri-fuel generators produce power using EPA certified engines for use with gasoline, natural gas (NG), and liquid propane (LP). Winco Multi-Fuel generators will supply reliable power when you need it most. Larger models offer a 4-wheel dolly kit and enhanced size fuel tanks standard. Will easily run essential items like pumps, sump pumps, furnaces, TV’s, and air conditioning units. This unit comes standard with the 4 wheel dolly kit. Look for the many features and options available on these Winco Multi-Fuel Portable Generators all units. Made in the USA.