Snapper SP90 21-Inch Rear Wheel Drive Variable Speed Self-Propelled Lawn Mower with 775ex Series OHV 175cc Engine Self-propelled, variable speed rear wheel drive 775ex Series OHV 175cc engine cuts through tall grass, weeds and other demanding terrains Adjustable height settings and Snapper's Quick Clean Technology Converts from side discharge to mulching to bagging for all applications 3-year limited warranty