Features: Discover the thrill of hands on assembly with this Stirling engine model, educational physics teaching tool that vividly demonstrates external combustion principles and thermal mechanical energy conversion through interactive construction, perfect for science enthusiasts. Crafted from alloy metal, this physics demonstration tool features smoothly, safe edges and robust components for safe operate in classroom settings. Ideal for students, teachers, and STEM hobbyists seeking engaging, hands on learning experience to deepen understanding of thermodynamics and mechanical energy. Use it in physics classroom demonstrations, homeschooling, laboratory investigations, or educational workplace as visual physics teaching aid to illustrate energy conversion processes and enhances interactive teaching. Fosters practical skills and critical thinking by observing mechanical motion, making complex theories accessible and enjoyable through this innovative educational Stirling engine model. Specifications: Component: Alloy Metal Color: As picture shown Size: Approx. 18x9x8.5cm/7.08x3.54x3.34in Weight: Approx. 650g Package Includes: 1Piece Stirling Engine Model note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color