Features: 1.The thermal energy is converted into the mechanical energy of the engine, and the working principle is more intuitively grasped, and the interest in physics is deepened. 2.Made of high?quality stainless steel material, hard, corrosion?resistant, and long service life. 3.Easy to assemble and has collection value. It can be used as a decoration or as a school experiment item. 4.The operation is simple, turning the flywheel clockwise to start, the engine will automatically rotate, easy to operate. 5.Contains other accessories needed for the experiment, you don't need to spend extra money to buy, which brings more convenience to the experiment. specification:Condition: 100% Brand New Item Type: Stirling Engine Material: Stainless Steel Color: As the Picture Shown PackageList:1 x StirlingEngine 1 x Tank1 x Lamp Cover1 x Wick