ECHO PB-7910 Backpack Blower The PB-7910 is a commercial-grade high-performance backpack blower with an advanced 79.9cc 2-stroke engine. Features Has a 79.9 cc professional-grade, two-stroke engine for superior performance and durability Has 835 CFM, 240 MPH, and 40 N of blowing power, which increases productivity The metal ring on the lower pipe helps reduce pipe wear and is useful for scraping debris Its exclusively vented back pad provides cooling air that circulates around the user to keep them comfortable in hot weather Its side-mounted, heavy-duty, dual-stage air filtration increases engine life Has a variable-speed throttle with cruise control that allows the user to lock the throttle at various settings Has a heavy-duty padded backrest with shoulder straps to ensure operator comfort Features Posiloc™ pipes to ensure a secure connection and maximum durability