1、Scope Of Application: Mainly used in children's science projects, physics learning and mechanical learning, classroom demonstrations and other occasion. 2、Stirling Engine Model: It is a well designed and made mechanical toy, very suitable for showing the basic principles of external combustion engines. 3、Function: It is convenient to intuitively understand the working principle of the Stirling engine, and deepen the interest and understanding of physics. 4、Well Manufactured: The Stirling engine is made of high quality materials and elegant craftsmanship, strong and durable, not easy to rust, and long‑term use. 5、Innovative Gift: The model is a great gift for anyone interested in science. It can be used as a teaching tool to demonstrate knowledge of mechanics and physics. Item Type: Stirling Engine Model Material: Iron Weight: Approx. 316g / 11.1oz Product Size: Approx. 12x6cm / 4.7x2.4in Product Use: It is a meticulously designed and made mechanical toy, very suitable for showing the basic principles of external combustion engines 1 x Engine Model 1 x Transparent Plastic Ethanol Bottle (Without Liquid) 1 x Hex Wrench 1 x White Wick 1 x Transparent Glass Bottle 1 x Manual