EHVYBDX Free Piston Stirling Engine Model Science Physics Teaching Popular Science Birthday Gift Decoration, Physical Experiment

High-quality: Selected high-quality metal materials, exquisite workmanship, high-precision coordination of various parts, stable and firm base. Usage: After assembly, add about 2/3 of the alcohol to the alcohol lamp, ignite the alcohol lamp and place it under the heating cylinder to preheat for 30 seconds, turn the flywheel by hand to help start, so that the diode glows. Significance and Value: You can exercise your hands-on ability, increase your knowledge of physics, and increase your interest in learning. Superior quality and exquisite appearance also make it of high collection value,great physical experiment gift for adult and kids . Guarantee: If you are not satisfied with our item, please contact us, we promise to give you a satisfaction answer, Your complete satisfaction is our greatest priority., Manufacturer: EHVYBDX