The STIHL Magnum™ professional backpack blower offers the standard STIHL proven fuel efficiency – up to 28% greater as compared to competitive models tested – and an impressive power-to-weight ratio, but with many unique enhancements. The improved engine delivers increased durability and longer life. The new nozzle is specially designed with an extended wear area to prolong equipment life, and the specially-designed nylon harness provides high wear resistance. Easy-to-adjust blower tubes offer versatility for a wide range of jobs. And as one of the cleanest-running backpack blowers in its class – with emissions 69% cleaner than current EPA requirements (as of information posted at www.epa.gov March 2009) – the STIHL Magnum™ is an environmentally responsible tool for heavy-duty leaf blowing and debris cleanup.712CFM 201MPH 65CC / 3.95CU 20.9 LBS. 4 Mix Powerful and fuel-efficient, low emission engine, Three-position adjustable blower tube, Adjusting Harness, Reduced Vibration Levels, Single-Handed Operation.