Base Unit, Tandem Vibratory Roller, 20.2hp Kohler ECH750 T4 Final Gas Engine, 2,964lb Max Operating Weight, 3,400lbf Centrifugal Force, 12v Starter Battery, Hydraulic Steering, Dual Drum Hydrostatic Drive System, Front Vibrating Drum and Rear Static Drum, 35.4in Drum Width, 34.6gal Water Tank Capacity.