About this item This fits your . Make sure this fits by entering your model number. High Quality: Made of metal material, stable and sturdy. High speed and long running without wear. Alcohol lamp fixed with screws, more reliable and safe. Exquisite Appearence: Gatling blaster shape. The engine has a total of six cylinders that rotate when it is started, like a machine blaster firing. The bright metallic color adds a mechanical feeling. Easy to Operation: On the premise of ensuring safety, to ignite the alcohol lamp. The alcohol lamp heats the piston tube, and the dry burning air expands to generate power, drive the flywheel to rotate quickly, thus lighting the bulb.(95% alcohol should be used in the operation (not included), not water, kerosene, gasoline, lighter oil, liquor.) Educational Value: By operating the engine, children would observe and know the operational process and more intuitive understanding of the operating principle of stirling engine, deepening their interest in physics. Wide Application: It has a wide range of application as, great gift for Kids' science project, Physical/mechanical learning, teacherâ€s Demo props on the class, birthday gift for friends, families, parents, kids, etc.