Premium Material---The molecular model have good durability, Safe and non-toxic, wear-resistant, corrosion-resistant, not easy to damage. The product can endure many years. Never worry about broken problem, high gloss and texture. Product Feature---This chemistry model can help chemistry learner understand the 3 dimension Molecular and molecule in invisible -type world. It is an tool to children or the interest of students when learning chemistry. Precise Chemistry Model---This sophisticated model contains a full complete set to you to carry on the experiment. for teachers or parents, you can teach your students or children about the complex molecular structure much easier than only picture in books. Powerful Function---This model contains C,H,O,N,Br and other metals and a of single and double bonds, long bonds, long keys. Can be put high school, university chemistry in most of the or inorganic molecular structure model for the study of experimental operation. Orbital Model Kits--- product contains extra orbital model for advanced education in chemistry. In addition, the model can enhance practical to link the molecular. Therefore it is an part for students and children. Material:ABS colour:As Shown Package Contents: 86 x Model 153 x Link 1 x Link tool 1 x Plastic Box Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.