Low Temperature Differential LTD Stirling Engine Coffee Powered Gadget

Features:

.LTD Stirling Engine: The dreamlike intelligent engine is mainly made of metal for metallic luster and exquisite appearance.  
.Simple Operation: Place the engine model on a water cup or coffee cup with the water temperature above 90 degrees Celsius and the undulating flywheel will magically run after half a minute of preheating. The engine is a desktop toy for great enjoyment.  
.Durable, Remaining Operation: the engine is durable and mute in operation, with enough temperature difference for remaining operation. The engine model makes an excellent display for your desktop and office table.  
.Multiple Uses: The engine is a cost-effective and interesting product for scientific experiment projects, energy conversion and dynamics studies, and teaching demonstrations. The engine is an amazing toy for conversation starter with your friends and everyone wonder how it works.  
.Perfect Gift: The engine model is a perfect surprise gift on birthday and Christmas for friends, family, parents or children, an exquisite toy for many mechanical enthusiasts, model collectors, and a superb teaching tool favored by school teachers. Suitable for ages 8+.
.Note: Please use a little graphite for lubrication to make the engine quiet down if there is mechanical noise. You can scrape the graphite of a pencil with a knife. Do not add oil for lubrication because the oil will become mixed pollutant when mixed with the dust in the air, resulting in greater friction. Otherwise, the Stirling engine will not function.  

Specifications:

.Material: Alluminum Alloy + Stainless Steel + Glass
.Product Dimensions: 8.9 x 8.9 x 14.5cm
.Product Weight: 200g
.Package Dimensions: 20.5 x 11.5 x 18.5cm
.Package Weight: 330g
.Paking: Graphic Carton