Features: The Stirling Engine Physics Experiment Model demonstrates efficient thermal mechanical energy conversion using alloy construction, ideal for visualizing thermodynamic principles in classrooms and labs. Featuring effortlessly assembly design and easy observation, this alloy built construction allows clearly visualization of internal piston movements and heat transfer processes. Designed for STEM educators, physics students, and science enthusiasts seeks hands on learning tool for thermodynamics demonstrations. Perfect for interactive classroom experiments, science exhibits, and laboratory demonstrations requiring safe, shock resistant operate under repeated thermal cycling. Combines engineering with practical education, enabling users to explore new energy applications while observing precisely crafted alloy components in motions through clear acrylic chambers. Specifications: Component: Alloy Metal Color: As picture shown Size: Approx. 15x8x12cm/5.9x3.15x4.72in Weight: Approx. 400g 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