Metal
Novel Design: Heated by alcohol lamp, the model can run quickly with strong power. With mini electric generator to light the LED lamp
Easy Operation: Fill the alcohol burner with your 95% alcohol and preheating by the heating cylinder for 30s then stir the flywheel to start
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
Metal Base: The bottom plate is made of brushed aluminum alloy, and the flywheel is made of aluminum alloy. The connecting rod is made of stainless steel and the connecting sleeve of power cylinder is made of aluminum alloy
