Model Number:Rosilesi79xrbvkygmProduct Dimensions:1 x 1 x 1 cm; 690 GramsItem Weight:690 gPackage List: 1 x Stirling Engine 1 x Light Bulb (Random Color) 1 x Alcohol Bottle 1 x Sponge 1 x Small Light 1 x Rubber Band (Random Color) 1 x Quartz Tube Specification: Condition: Brand New Item Type: Stirling Engine Material: Stainless Steel Color: Silver Power Cylinder Diameter: 12.5mm/0.49in Piston Stroke: 15mm/0.59inMade of brushed stainless steel and heavy glass material, surface sandblasting treatment, beautiful and durable. The stirling engine is equipped with a bulb, which can be lighted by the electricity generated by the engine. It comes with a spare glass tube, an o-ring. If there is any damage, you can replace them quickly. Simple operation, use 95% alcohol filled alcohol burners and light them, let the light burn the circular cylinder for about 60-100 seconds, then gently push the wheel and it will run madly and create the electricity. It has a wide range of applications for children's science projects, physical/mechanical learning, teacher demonstration props, birthday gifts for friends, family, children, etc.Made of brushed stainless steel and heavy glass material, surface sandblasting treatment, beautiful and durable.The stirling engine is equipped with a bulb, which can be lighted by the electricity generated by the engine.It comes with a spare glass tube, an o-ring. If there is any damage, you can replace them quickly.Simple operation, use 95% alcohol filled alcohol burners and light them, let the light burn the circular cylinder for about 60-100 seconds, then gently push the wheel and it will run madly and create the electricity.It has a wide range of applications for children's science projects, physical/mechanical learning, teacher demonstration props, birthday gifts for friends, family, children, etc.