Black Max ZRBM254BV 25cc 3-in-1 Gas Blower/Vac and Mulcher 3-in-1 functionality allows for blowing, vacuuming and mulching Powerful commercial 25cc, full crank, 2-cycle engine.160 MPH 420 CFM Durable metal mulching blade. 10:1 mulching ratio 50:1 gas and oil mix ratio 2-Year Warranty