This is a precision metal Stirling engine model with a unique design that differs from regular Stirling models. It is built mostly from metal for quiet, stable operation and improved rust resistance. The custom thick glass heating cylinder supports longterm heating without pressure, and the brushed aluminum alloy base provides a refined, durable platform. Key benefits Durable and quiet operation: Mostly metal construction reduces vibration and noise and resists corrosion for long service life. Stable heating: Thick glass heating cylinder tolerates extended heating periods without pressure buildup. Attractive and sturdy base: Brushed aluminum alloy bottom plate is both durable and visually appealing for display or classroom use. Easy to operate: Simple fuel and start procedure makes it suitable for demonstrations and handson learning. How to operate 1. Fill the burning container with 95 percent alcohol. 2. Light the fuel and let the roundended glass cylinder warm for about 60 to 120 seconds. 3. Give the flywheel a gentle push and the engine will begin to run. Applications and use scenarios Classroom demonstrations: Show thermodynamics and heat engine principles to students with a clear, working model. Home or family science projects: A handson tool for parents and children to explore mechanical and physical concepts under supervision. Lab or hobby display: Use as a teacher prop, desktop demonstration model, or part of a small experimental setup. Specifications Color: Gold Material: Metal with thick glass heating cylinder and brushed aluminum alloy bottom plate Size: Approx. 16.5 x 9.5 x 13 cm (6.5 x 3.74 x 5.12 in) Weight: Approx. 730 g Package includes 1 Piece Stirling Engine Model Notes Please allow 0 to 1 cm difference due to manual measurement. Actual product color may vary slightly from images due to monitor differences.