Model number: 81454 Chain saw Displacement: 37.2cc Length of guide bar: 16" or 18" Certificate: GS,CE, ... cylinder,air-cooledDisplacement 37.2cc Engine power 1.3KW Carburetor type DiaphragmaticStarting systemRecoiled, iuauelFuel mixed ratio 25:1Lubrication type, saw-chainAutomaticEngine oil tank ... power output, save more gas, more longer time for use. 37.2cc gasoline chain saw