Features: This engine features a balanced design, differing from standard Stirling models. It is primarily constructed from metal, ensuring quiet and stable operation. Durable and resistant to rust. The heating cylinder is made of thick glass material, capable of withstanding long-term heating without pressure buildup. The base plate is crafted from brushed aluminum alloy, offering an elegant and attractive appearance. Fill the fuel container with 95% alcohol and ignite it. Allow the flame to heat the cylindrical end for approximately 60–120 seconds, then gently spin the flywheel to start the engine. Ideal for eonal science projects, physics or mechanical learning, classroom demonstrations, and as a gift for birthdays or special ocns for friends, family, parents, and children. This versatile model is suitable for use in classrooms, laboratories, and home environments. It serves as an effective tool for teaching, demonstrations, and hands-on learning. Specifications: Color: Gold Material: Metal Size: Approx. 16.5 x 9.5 x 13 cm (6.5 x 3.74 x 5.12 in) Weight: Approx. 730 g Package Includes: 1 Piece Stirling Engine Model Note: 1. Please allow 0–1 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. 2. Due to differences in monitor displays, the image may not accurately reflect the actual color of the item. Thank you.