Poulan Pro 961120131 PR500N21SH Briggs 500ex Side Discharge/Mulch 2-in-1 Hi-Wheel Push Mower in 21-Inch Deck, 12-inch wheels 500E 140cc Briggs & Stratton primer engine 21-Inch deck push mower 2 in 1 side discharge and mulch capability 4-Quick height adjusters with 5 positions 7-Inch Front and 12-Inch Rear Wheels