Features: The stirling engine is equipped with 4 cylinders and warm lamp. It is safer to position the alcohol cylinder with magnet. Feel the perfect combination of metal and technology, reliable quality. Use 95% alcohol (not included) to heat the cylinder, and dry air expands to generate power, can not add water, kerosene, gasoline, lighter oil, liquor, candles. 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. The product itself has been assembled, can be directly used for experimental operation, simple and convenient. The piston must be rotated to prevent squeezing during adjustment and the two links cannot be removed outward. 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 Bulb 2 x Quartz Tube 2 x Rubber Band (Random Color) 2 x Alcohol Bottle .