The Greenworks 40V Mower features a 20 poly deck, dual blades, 2-In-1 design, dual battery ports with automatic switchover, 5-position single handle height adjustment, and push button start. 21 Self-Propelled (5.0Ah). 40V 21 LAWN MOWER – Get more done, faster, with Greenworks electric lawn mowers. This 40V self-propelled lawn mower provides up to 45 minutes of run-time with fully charged 5.0Ah battery (varies based on grass condition and operator technique). BRUSHLESS MOTOR / DURABLE STEEL DECK – This electric mower features a durable 21 deck, and a highly efficient brushless motor that provides more torque, quiet operation, and longer life. SINGLE LEVER HEIGHT ADJUST – 7 position height adjustment provides the best cut in all environments. 3-in-1 design offers rear bag, side discharge, and mulching capabilities. SELF-PROPELLED – Rear wheel drive power increases traction to tackle the toughest backyard terrain. VERTICAL STORAGE – Save 70% more space with vertical storage. MAINTENANCE FREE – The walk behind lawn mower is virtually maintenance free, with no gas, no oil, and no emissions. It starts instantly, is quiet, and delivers the power you need. FRONT WHEELS : 8 Inches. Factory Authorized Remanufactured using original parts and trained service technicians. Refurbished by SJM Recommerce, an authorized refurbishing center for the Greenworks brands.