Feature:1. [Reduce Resistance] Exquisite appearance, rhombus shaped connecting rod structure design, reduce lateral force, reduce resistance, increase flywheel design, easier to start, longer running time.2. [Interesting And Imaginative] Stirling engine model is a interesting and imaginative tabletop toy, designed with dual mini generator loads that can also be used as a tabletop decorative.3. [Stimulate Creativity] Can be used as a science educational toy to study how internal combustion engines work, provide material for children's science projects, stimulate curiosity and creativity.4. [Physics And Mechanical Learning] An perfect gift for anyone interested in science, and as a teaching tool to demonstrate knowledge of mechanics and physics.5. [Widely Application] Widely suitable for many situations, such as holiday gifts for family, friends and children, office, classroom presentations, etc.Specification:Item Type: Stirling Engine ModelBottom Plate Product Size: Approx. 19 x 9 cm / 7.5 x 3.5 inMaterial: Stainless steel, copperApplication: For children's science projects, physics and mechanical learning, classroom presentationsApplicable People: Over 14 years old, easy to use, can more intuitively observe the operation of the Stirling engineWeight: Approx. 927g / 32.7oz Package List:1 x Bottom Plate1 x Ethanol Bottle (Liquid Not Included)1 x Ethanol Lamp1 x Ethanol Wick3 x Hex Wrench1 x Chinese And English ManualNote:Accessories ethanol bottle (liquid not included)