Description: Very fantastic craftsmanship, made with metal alloy After the installation, put a cup of hot water, then it will run itself. The hotter it gets, the faster it goes! Being a gift, or a display on your desk or anywhere! Great gift for your friends or families. A stirling engine is a heat engine that operated by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, so that there is a net conversion of heat energy to mechanical work. Specification: Item Name: Stirling Engine Model Material: Alloy Size(D*H): Approx. 10*11.55cm / 3.94*4.53inch Package Includes: A Low Temperature Stirling Engine Model
