Double Cylinder Stirling Engine Model Physics Science Experiment Educational Science Toy For Kids Adults Beautiful appearance without loss of atmosphere, has two hot cylinders and is equipped with a light bulb. Feel the sense of metal and technology, reliable quality. The product itself has been assembled, which can be used as a decoration, and can be directly used to operate the experiment, which is simple and convenient. Entertaining and learning, through hands-on operation, you can understand the steam engine principle more intuitively by observing the whole engine running process, and deepen your interest in physics. Use 95% alcohol in the operation(not included), dry air to expand the power to generate electricity, can not add water, white wine, candles and oil. The piston should be rotated to avoid smashing during adjustment, and the two connecting rods cannot be removed outward. PRIORITY GIFT OPTION: great gift for Kids' science project, Physical/mechanical learning, teacher's Demo props on the class, birthday gift for friends, families, parents, kids, etc. Colour:silver Material:Metal Size:18 x 8 x 8cm Package Contents: 1 * Double-cylinder Engine Body 1 * Bulb 2 * Alcohol Cylinder 2 * Qartz Tube 4 * Rubber Band