1.Guide Bar size:8"(203mm) 2.Rated input power:550W 3.Displacement:18.3cc 4.Chain pitch:3/8" GASOLINE CHAIN SAW UN181800 Power Tool ModelUN181800Input Power550WDisplacement:18.3ccChain pitch3/8"CGuide bar size8"(203mm) Fuel mixture ratio25:1CertificationCE/GS/EMC/ROHS/UL Packing: N.W/G.W.3/2KGSCarton Capacity1pcsCarton Size30*21*21CM 550W GASOLINE CHAIN SAW UN181800