Model number: 81450 Chain saw Displacement: 45cc Length of guide bar: 18" or 20" Certificate: ... Carburetor type DiaphragmaticStarting systemRecoiled, iuauelFuel mixed ratio 25:1Lubrication type, saw-chainAutomaticEngine oil tank capacity0.26LFuel tank capacity0.55LLength of guide ... output, save more gas, more longer time for use. 45cc gasoline chain saw