1. Inorganic/organic chemistry tutorial, organic molecular structure model, ball-type molecular structure model. 2. The model can be used to formulate the structural of various molecules of inorganic and organic substances in chemical textbooks. 3. The model set can be used to construct a variety of common and slightly complex C, H, O, N, Br, l chemical organic molecular structure models, suitable for teaching and laboratory use. 4. Made of environmentally friendly plastic, it is very safe and will not be broken, and has a long service life. 5. The model can increase the students' interest in learning, and the teacher can explain it more intuitively. Very convenient. 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. Sold by-Dadangjia