Features: Simple operation, use 95% alcohol filled alcohol lamp to heat the piston tube, and the dry combustion air expands to generate power, driving the flywheel to rotate rapidly, thereby lighting the lamp. Through hands-on operation, you can observe the entire process of Stirling engine operation, more intuitive understanding of Stirling principles, and deepen your interest in physics. Made of high-end and durable material; high temperature resistant glass cylinder looks exquisite and beautiful. In addition to the sterling engine, it is equipped with alcohol lamp, 5V 5W large bulb, glass tube, replacement cylinder and fan, making it more interesting. It has a wide range of applications for children science projects, physical/mechanical learning, teacher demonstration props, birthday gifts for friends, family, children, etc. Specification: Condition: Brand New Item Type: Stirling Engine Material: Stainless Steel Color: As Picture Package List: 1 x Stirling Engine 1 x Alcohol Bottle 1 x Fan Blade 1 x Fan Bracket 1 x Sponge 1 x Light Bulb (Random Color) 2 x Clip 1 x Rubber Band (Random Color) 1 x Tube 1 x Small Light .