The Troy-Bilt TB400 Gas Leaf Blower offers the convenience and power you desire. The 25cc, 2-cycle gas engine is lightweight and powerful with air speeds up to 180 mph and clearing power of up to 400 cubic feet per minute (cfm). The TB400 comes with SpringAssist technology for faster and easier pull starts and its variable speed throttle allows for better handling and greater control over blowing performance. For comfortably blowing leaves and debris from yards and hard surfaces.