Concrete Chain Saw, Included Chain Force 3 for Cutting Concrete, Bar Length 14 in, Horsepower 5, Engine Type Two Stroke, Air Cooled, Fuel Type Gas/Oil (50:1 (2 Percent)), Engine Displacement 77 cc, RPM 11,500 +/- 500 RPM, Primary Application - Concrete Chain Saws Cinderblock, Vibration 7.2 m/sec Front Handle, 8.5 m/sec Rear Handle, Fuel Mix Ratio 25 to 1, Fuel Tank Capacity 0.23 gal, Noise Level 101.0 dB, Tool Weight 21 lb, Gas Powered, Water Supply 20 psi min