Usage Tips:Premium Material---The set of 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 well texture. Product Feature---This organic chemistry model can help chemistry learner understand the 3 dimension Molecular and molecule in invisible Micro-type world. It is an essential tool to inspire children or the interest of students when learning chemistry. Precise Chemistry Model---This sophisticated model contains a full complete set to offer 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 variety of single and double bonds, long bonds, long keys. Can be put high school, university chemistry in most of the organic or inorganic molecular structure model for the study of experimental operation. Electron Orbital Model Kits---Our product contains extra electron orbital model for advanced education in chemistry. In addition, the model can enhance practical ability to link the molecular. Therefore it is an essential part for students and children. Material:ABS colour:As Shown Package Contents: 86 x Atom Model 153 x Link 1 x Link Tool 1 x Plastic Box Only the above package content, other products are not included. Note: Light shooting 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.