Three models feature a cleaning range of 2 to 3.5 gpm. All have a rugged steel chassis and cage painted with an epoxy powder-coat finish for all-weather protection. As with other Karcher pressure washers, the new series has industrial-grade components. Industrial-grade motors with 120V and 230V single-phase configurations power the units. The models come with a five-year warranty. And yes, in Summer 2005, Karcher pressure washers cleaned Mt. Rushmore.