Feature: 1. Multi Purpose: Stirling engine model kit has a wide range of applications, such as children's science projects, holiday gifts, physical machine learning tools, teacher demonstration props in the classroom, etc. 2. Smoother Operation: There are 4 anti skid pads on the bottom of stirling scientific physical model to ensure smoother operation with low noise, and low pollution. 3. Simple to Operate: Stirling scientific physical model is durable, fill the inflamer with 95% ethanol and light it. Let the light burn on the cylinder at the rounded end for about 60 to 120s, push the wheel lightly and it will work. 4. Strong Practicability: Stirling engine motor model is a model for physical experiments, glass tubes and glass ethanol lamps are convenient for direct observation of piston movement. 5. Practical Gifts: The stirling engine model is a well designed mechanical toy that nicely demonstrates the fundamentals of an external combustion engine and makes a great gift for family and friends. Specification: Item Type: Stirling Engine Motor Model Colour: Grey Material: Zinc alloy, stainless steel, glass, log. Output Voltage: 3.0-5.0V Fuel: 95% ethanol. . Package List: 1 x Stirling Engine Motor Model1 x Ethanol Bottle1 x Ethanol Bottle Cover1 x User Manual1 x Backup Glass Heating Tube1 x Ethanol Rope1 x LED Light String