with small size, light weight, mobile convenience, no noise, energy conservation and environmental protection, inexpensive. Displacement:37.2cm3Fuel tank capacity:0.31litOil tank capacity:0.21litChain brake syatem:auto N/ASprocket type:spurSaw chain type:91VGChain tensioner:front Primary pump:N.AStandard bar type size:sprocket 16inPower unit dry weight:4.2kg gasoline saw