Engine:air-cooling,4-stroke, single cylinder gasoline,139F Displacement:31cc Product SpecificationsCarton Size (cm)G.W/N. ... W(kg)LWHEngine:air-cooling,4-stroke, single cylinder gasoline,139FEngine:Engine:Displacement:31cc3629.5246.3/4.3Engine power: 0 ... : metal blade(3 teeth), nylon head,tools kit,operation manual Grass Trimmer