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Metal

Novel Design: Hot Air Stirling Generator provide a bright voltage digital display meter, LED or light bulb and heated by alcohol the engine runs steadily at high speed and generates electricity

Material: Metal + Quartz Glass, The heating cylinder is specially designed to be made of thickened glass, which has no pressure even if heated for a long time

Creative Gift: This is a great office desk piece gift, it works just as well as industrial art as as an educational tool and a neat way to show children how an engine works

Educational Toy: This is a fun and imaginative desktop technology toy. You can watch the magic work and energy transformation process

Usage: It is a science educational toy that can be used to study the working principle of the external combustion engine and inspire their curiosity and creativity