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:PlasticPackage List:116 x Atom Model150 x Link 1 x Link Tool1 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.