Features: The Stirling Engine Model demonstrates efficient low temperature differential energy conversion with its alloy construction, ideal for thermodynamics education and hands on physics experiments. This physics teaching tool allows quick setup and disassembly for repeated classroom demonstrations without compromising structural integrity. Designed for STEM educators and students aged 12+, this Stirling engine model enhances conceptual understanding through clearly visualization of thermodynamic principles in school to university levels physics curricula. Perfect for laboratory experiments and interactive classroom demonstrations, the alloy framed engine operates solely on temperature gradients, demonstrating clean energy applications in academic settings. Operated by thermal differentials showcases sustainable science concepts, making it essential resource for educators teaching new energy fundamentals. Specifications: Component: Alloy Metal Color: As picture shown Size: Approx. 12x18cm/4.72x7.09in Weight: Approx. 220g Package Includes: 1Piece Stirling Engine Low Temperature Difference 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