Excellent performance and beautiful appearance. .The robot is cool and full of style. High quality, power cylinder, heating cylinder mounting head, piston material is brass, high precision, wear and durable. .Flywheels, gas-filled pistons, alcohol lamps, etc. are made of aluminum alloy, which is luxurious. .The heating head is made of quartz glass, which is much better than ordinary glass. .The bottom plate and connecting rod are made of 304 stainless steel, which is firm and strong. .The model as a whole is a material that does not rust. .The pursuit of the details, the overall fine grinding, touched very smooth, very metallic and modern technology, to achieve a dual combination of texture and beauty. .The Stirling engine is powered by the expansion of the gas and the compression of the cold. .95% alcohol (self-prepared) should be used in the operation. Water, kerosene, gasoline, lighter oil, and liquor should not be added. .The alcohol lamp heats the piston tube, and the dry air expands to generate power, which drives the flywheel to rotate rapidly, and the rotation speed can reach about 2000 rpm every minute. .Entertaining and learning, through the hands-on operation, you can observe the entire engine running process, more intuitive understanding of the Stirling engine power generation principle, and deepen your interest in physics learning. .The product itself has been assembled and can be directly used, and its superior quality and exquisite appearance also make it have a high collection value, which can be used as a high-grade decoration. .The product is suitable for people over the age of 14 and should be careful not to be hot to the high temperature during the operation.