I believe this is a 21" mower. Its a Silver series with a 4.5hp 2 cycle engine. Its also self propelled. My Mom bought it in 1997 and it was used less than 10 hours (I started cutting her lawn with my equipment). She had it serviced last year. The model is # 10301. A bagger and side discharge plate is included. Asking $110. Must be picked up- sorry, no shipping.