Bamboo Base, Alloy Steel Power Cylinder, the rest are aluminum alloy, strong and durable, all parts are surface treated to avoid rust. No oil, no noise. HOW TO GET STARTED?- Fill the alcohol burner with your 95% alcohol (we recommend this fuel, no more than 2/3 of the container) and light it. Let the light burn on the cylinder at the round end for about 60-120 seconds, then push the wheel lightly and it will work like a charm. COLLECTIONS AND GIFTS - When you're not playing, it can be placed on your desk or cabinet as an art piece. You can also give it as a gift to your relatives or friends. If you're a Stirling collector, this is an indispensable collectible. Education - It has a wide range of applications, such as education for children's science projects, physics/mechanical learning, teachers' demonstration props in classrooms, families, parents, children, etc. Many of our clients are from schools, colleagues, etc. Stunning snippets of dialogue on your desk - it's fun to see people's expressions and reactions as they squeeze a little for this Stirling engine. Put some combustibles and let the flywheel run, then it works like a charm. All your guests want to know what happened, the icebreaker was a success. What a wonderful toy. Specifications: Material:Metal Colour:As shown Size:80 x 150mm Package Contents: 1 x Stirling Engine Model (The color of the fan blades will be sent randomly, and the specified color will not be accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.