Htovila Hot Air Stirling Engine Motor Model Flywheel & Saucer Design Full Metal Physics Science Experiment DIY Gift for Teacher Student Adult Birtay Christmas

Features: ?? Transparent glass cylinder, vertical structure of steam machine, more convenient to observe the state of motion. ?? Vintage style spherical boiler, steam pressure can be released evenly. And equipped with miniature safety valve. The all copper lamp with fire extinguishing gland has a more retro shape. ?? Large size flywheel design, faster start, more stable operation. ?? Simulation of the sound of the jet, making the sound more realistic. ?? Great educational toy, classroom or laboratory experimental teaching aids, the best choice gift for students, teachers, children, friends and colleagues. Specification: Model: QX-M-ZQJ-07 Material: Metal Color: Green Size: 200 x 90 x 140mm Weight: 700g/23.9oz Package Size: 230 x 130 x 160mm/9 x 5.1 x 6.1in Package Weight: 950g/33.5oz Packing List: 1 x Stirling Engine Model DIY Kit

?? Transparent glass cylinder, vertical structure of steam machine, more convenient to observe the state of motion. ?? Vintage style spherical boiler, steam pressure can be released evenly. And equipped with miniature safety valve. The all copper lamp with fire extinguishing gland has a more retro shape. ?? Large size flywheel design, faster start, more stable operation. ?? Simulation of the sound of the jet, making the sound more realistic. ?? Great educational t