Features: This cylinder Stirling engine model demonstrates thermodynamic principles through instantly monitoring via built in meter, while powering 5W LED bulb to visualize energy conversion efficiency. Crafted with metal construction, the Stirling engine model features balanced twin cylinder operations and integrated display, ensuring accuracy and durability for repeated educational demonstrations. Ideal for STEM educators, physics enthusiasts, and hobbyists seeks hands on learning tool to explain mechanical energy conversion in classrooms or workshops. Perfect for interactive thermodynamics experiments in school labs, science experiment, or home education setups where visual demonstration of heat to electricity energy conversion enhances learning engagement. Combines industrial metal components with clearly operational visibility, making complex physics concepts accessible through hands on experimentation with Stirling engine mechanics. Specifications: Component: Alloy Metal Color: As picture shown Size: Approx. 16.5x9.5x13cm/6.5x3.74x5.12in Weight: Approx. 1250g Package Includes: 1Piece Stirling Engine Model with 5W 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