Features: 1Stirling Engine Motor Model: Physical experimental model, glass tube and glass alcohol lamp facilitate direct observation of piston movement. 2Anti Slip: There are 4 anti slip pads at the bottom of the model to ensure smoothing operation. 3Simple Operation: Easy to operate, add 95% alcohol to the alcohol combustor and ignite. Let the lamp burn on a cylinder at one end of the circle for about 60?120 seconds, and then gently push the wheel to make it work. 4Excellent Performance: Stirling engine motor model has a beautiful and elegant appearance, low noise and low pollution. 5Wide Applications: Wide range of applications, can be used as children's science project gifts, physical machine learning, teacher classroom demonstration props, etc. Item Type: Stirling Engine Motor Model Material: Zinc Alloy, Stainless Steel Fuel: 95% Alcohol Color: Purple Package Included: 1 x Stirling&nbspEngine&nbspMotor&nbspModel