Features an ultra low profile of just 3-3/4" for burnishing hard to reach areas. Rugged, patented solid steel body. 18hp 603cc Kawasaki engine with low oil shut down and safety regulator fuel system. Premium catalytic muffler for ultra low CARB and EPA emissions. 12 volt battery key start. Adjustable comfort handle with click-n-lock throttle cable. Advanced polymer composite pad driver. Adjustable back wheels for controlled pad pressure. Patented airtight floating dust skirt available. Green cleaning certifications: EPA, CARB, LEED, CE, GS-42.