1,The high temperature Stirling engine is more compact and features a lever mechanism and rocker mechanism for a more mechanical look. 2,Equipped with DIY accessories for scientific experiments and student physics education tools. 3,This model and DIY parts allow your child to learn mechanical knowledge such as alcohol burning and heat transfer, sealing technology, lever, gear drive, and more. 4,It adopts mirror stainless steel bottom plate, brass cylinder body, spring steel heat-treated nickel-plated bracket and fittings, aluminum alloy gas-filled piston, glass cylinder liner, precision bearing and bearing steel shaft, zinc alloy flywheel, which will not rust or fade. 5,It is forbidden to add oil to lubricate. Because the oil will mix with the dust in the air, it will become oil dust, and eventually the friction will be larger, so that the Stirling engine can not run freely. Condition: Item Type: Stirling Engine Material: Metal, Plastic Product Size: Approx. 10 x 4.5 x 6 cm / 3.9 x 1.8 x 2.4 in Weight: Approx. 200g / 7.1oz 1 x Engine 1 x Alcohol Bottle 1 Bag x Accessories 1 x Tube 1 x User Manual 2 x Glass Tube 2 x Rubber Ring Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.