45cc chian saw advantage: Super quality; equipped with Walbro carburator, Oregon chain. Easy start. 45cc CHAIN SAW; EXHAUST 45CC 1 .Huayang carburetor and Imported oligen chain 2. single cylinder, two-strke, air-cooling gasoline engine 3. Max cutting dia:20"(500mm) 4. Rate output Power:1.8kw. 5. Idling speed:2800r/min 6. chain pitch:0.325". 7.Guide bar size:16"/18"/20" 8.Meas:51*29*30cm.