Features: This alloy Stirling engine model provides attractive alternative to plastic models, designed for hands on assembly to demonstrate thermodynamic principles effectively. Featuring precisely engineered components without sharply edges, the hands on assembly Stirling engine model safely simulates real Stirling engine construction, making it professional physics teaching aid for educational purposes. Ideal for students of all ages, teachers, and homeschooling parents, this educational model fosters STEM learning through interactive assembly and practical experimentation. Perfect for classroom teaching demonstrations, home study, or office displays, its compact design ensures easy portability and quick setup without additional tools. By offering tangible way to explore thermal dynamics, this hands on assembly Stirling engine model set enhances critical thinking and hands on skills in engaging activity for long term educational use. Specifications: Component: Alloy Metal Color: As picture shown Size: Approx. 16x6x7.5cm/6.3x2.36x3.95in Weight: Approx. 600 Package Includes: 1Piece Stirling Generator Engine Model with LED Bulb 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