1、Inorganic/organic chemistry tutorial, organic molecular structure model, ball-type molecular structure model. 2、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. 3、Made of environmentally friendly plastic, it is very safe and will not be broken, and has a long service life. 4、The model can increase the students' interest in learning, and the teacher can explain it more intuitively. Very convenient. 5、Strong bond between atom and key link,not easy to deform. Features: Inorganic/organic chemistry tutorial, organic molecular structure model, ball-type molecular structure model. 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. Made of environmentally friendly plastic, it is very safe and will not be broken, and has a long service life. The model can increase the students' interest in learning, and the teacher can explain it more intuitively. Very convenient. Strong bond between atom and key link,not easy to deform. Specification: Material:Plastic Package List: 116 x Atom Model 150 x Link 1 x Link Tool 1 x Plastic Box Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.