This TBE304 4-Cycle Troy-Bilt engine provides more power at lower RPM's than 2-cycle trimmers. Spring Assist Starting Technology provides an easy start with just a smooth and steady pull. Highlights: Blade: 1 30 cc 4 Cycle gas edger No Gas/Oil mix Spring assist starting system Dual tip blade: 9-Inch 5 Position height adjustment Compact loop handle Wheels: 5-Inch