Features: 100% brand new and high quality [Material] It is made of metal, which is sturdy and durable, and it is not easy to be damaged during the assembly process. [Size] 16x8x7cm/6.29x3.14x2.75inch. By operating the engine, children will observe and understand the operating process of the Stirling engine, understand the working principle of the Stirling engine more intuitively, and deepen their interest in physics. [Simple operation] Fill the alcohol burner with 95% alcohol, and the light will burn the cylinder for about 60-100 seconds. Simple operation and long service life [Innovative design] Powered by a Stirling engine model, equipped with multi-color LED lights, which can be installed on the motor to generate electricity from the heat generated by high-grade alcohol to drive multi-color LED lighting. [Wide scope of application] This model kit has a wide range of applications, such as children's science projects, physics/mechanical learning, teachers, classroom demonstration props, friends, family, parents, children's birthday gifts, etc. Package Includes: 1x Stirling Engine Model Specifications: Material: Metal Weight: 551g Size: 16x8x7cm/6.29x3.14x2.75inch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.