Specifications: .Material: Aluminium Alloy + Quartz Glass .Product Dimensions: 17.5 x 8 x 9.5cm .Product Weight: 340g .Package Dimensions: 20.5 x 11.5 x 18.5cm .Package Weight: 480g .Packing: Graphic Carton .Ages: 8+ Package Including .1*Stirling Engine .1*Alcohol Lamp .1*Lamp Beads .1*Tweezers .2*Internal Hexagonal Wrench .4*O-rings .1*Silicone Buckle Tube .1*Instructions ➤ [Stirling Engine Model] - The amazing Stirling engine measure size is 17.5 x 8 x 9.5cm, which a kind of external combustion engine only heated by an alcohol lamp for strong power and fast running. ➤ [Mechanical Insight] - Observe the entire manipulational process of the engine, understand the structure and principles, and witness the fascinating energy conversion. ➤ [Material] - Aluminium Alloy + Quartz Glass. The engine is treated with a mirror polish on the surface for excellent rust prevention and fast color. Adopts the thickened quartz glass heating tube for wear resistance, safety and reliability in long-term use. ➤ [Wide Applications] - Perfect as a physics/mechanical demonstration tool, classroom teaching aid, lab experimental equipment, gift display, or desktop decorative ornament. ➤ [Ideal Gift Choice] - Looking for a unique and thoughtful gift for hobbyists, collectors, or history enthusiasts? Look no further! The Stirling Engine Model Kit, an unforgettable gift. ASIN B0CZF3TQZ1 Size 17.5 x 8 x 9.5cm Theme Physics Brand Name Generic Manufacturer Generic Material Type Metal Item Type Name Engine Model Item Dimensions 11.5 x 20.5 x 18.5 inches Is Assembly Required No Educational Objective STEM Manufacturer Part Number L202403263429350EN Manufacturer Maximum Age MONTHS 600.0 Manufacturer Minimum Age MONTHS 192.0