GAS ENGINE: This horizontal gas engine looks unique. The water cooling stirling engine with wooden base for easy placement and operation. HIGH QUALITY: The gasoline engine is elaborately made of all metal and the surface is polished to make it very smooth. The engine is fixed on the wooden base the structure is stable and reliable. Manufacturered by Yamix. HAND START MODEL: The outer pulley is easy to start by hand. You will love this exquisite horizontal gasoline engine model. WONDERFUL GIFT: A great gift for Kids science project physical or mechanical learning teachers Demo props on the class birthday gift for friends families parents kids etc. Kids should be accompanied by adult. PARAMETERS: Engine size: 180 x 125 x 75mm. Size of wooden base: 180 x 66 x 50mm. Cylinder diameter: 22mm. Stroke: 20mm. Revolution: 1200rmp/min. Power supply: 3.7v. Fuel: gasoline.