Description Specification Product Name Low Temperature Stirling Engine ModelProduct NO K311Product Color GoldProduct Material Aluminium Alloy Stainless Steel GlassProduct Size 180 120 110mmFor Age 7 Features Stirling Engine Mainly made of metal the dreamy and eco friendly machine model is exquisite aesthetic and rich in metallic luster Simple OperationEasy Use Put it on a water cup or coffee cup with a water temperature above 90 degrees Celsius then turn the flywheel into a magical operation after half a minute of preheating for an enjoyable toy on your desk Build to Last and Continuous Running The enduring and sturdy engine works silently It will run continuously and permanently as long as the temperature difference is enough which is capable of placing on your desk and office table for a long time Wide Application The affordable and stunning model can be used for scientific laboratory projects energy conversiondynamics studies and teaching demonstrations It is also available as an astounding toy and talking point between you and your friends and everyone will wonder how it works Ideal Gift The Stirling engine is a perfect birthday or Christmas gift to surprise friends family parents and children a delicate toy for model collectors and an incredible teaching tool for school teachers Cautious You only need to fill the glass by about half If there s a bit of mechanical noise just lubricate it with a little graphite to quiet it down You can