1、Given that the bottom plate is made of brushed stainless steel, which is exquisite and beautiful. 2、With CNC processed frame and firm sandblasting treatment, such stirling engine model can perform well. 3、The heating cylinder is made of customized thick glass material, which supports long-term heating. 4、Supports simple operation and long service life, such engine model's high playability can keep its attraction for a long time. 5、And such a toy can be widely used for children's science projects, physics / mechanical learning and teacher demonstration props in the classroom. 1 x Engine Model1 x Light Bulb (Random Color)1 x Bottle1 x Rubber Band(Random Color)1 x Qartz Tube1 x Small Light3 x Small Rubber Ring1 x Screw1 x Engine Elicitor Item Type: Engine model