Features: enviromental friendly, low noise level, easy to operate and maintain, ideal tools to ease your garden work. Specification: engine: 1-cylindr,2-stroke,air-cooled gasoline engine; displacement:78.5cc; N.W.:6.5kg; Guide bar size:18inches(457.2mm); Saw chain pitch:0.325inches(8.26mm); saw chain gauge:0.058inches(1.47mm); fuel: petrol and engine oil mixture(25:1); lubrication: mixed fuel;