• Aluminum Alloy Stainless Steel Brass
• 【Fully Functional Suction Fire Stirling Engine】：This Stirling engine model kit demonstrates the working principles of a heat energy engine, making it a great tool for physics experiments and science education
• 【Premium Pure Copper Air Cylinder Design】：Built with a high-quality pure copper air cylinder, this model ensures efficient heat conduction, providing stable and smooth operation for extended running time
• 【Engaging Hands-On Learning Experience】：Designed to visually showcase heat-to-mechanical energy conversion, this working Stirling engine model helps students and enthusiasts better understand thermodynamics and mechanical physics
• 【Durable & Elegant Display Model】：Crafted with fine metal components and a vibrant yellow finish, this engine model is both a functional educational tool and an eye-catching desktop display for collectors and hobbyists
• 【Perfect Gift for Science & Engineering Enthusiasts】：Ideal for students, teachers, and mechanical enthusiasts, this heat-powered Stirling engine kit makes an excellent gift for those interested in STEM learning and physics experiments