Feature:1. Physical Model: Stirling engine motor model adopts glass tube and glass alcohol lamp to facilitate direct observation of piston movement2. Anti Skid: Stirling engine motor model has four anti skid pads at the bottom, which can effectively ensure stable operation3. Simple Operation: Stirling engine model kit is used for a long time. Add 95% alcohol (recommended) into the alcohol inflamer and light it. Let the lamp burn on the cylinder at one end of the circle for about 60 to 120 seconds, then gently push the wheel4. Practical and Reliable: Stirling engine model has beautiful appearance, low noise and low pollution, and can be used with confidence5. Scope of Application: Stirling engine toy kit is suitable for children's science project gifts, physical machine learning, classroom demonstration props for teachers, etcSpecification:Item Type: Stirling Engine Motor ModelMaterial: Zinc Alloy, Stainless Steel, GlassOutput Voltage: 3.0 to 5.0VFuel: 95% AlcoholColor: Golden.Package List:1 x Engine Model1 x Alcohol Bottle1 x Spare Heating Glass Tube1 x Alcohol Pad1 x LED Lamp Bead3 x Gum Ring1 x Bulb1 x Rubber Ring