Complete molecular modeling suite. This organic chemistry model kit is used to create models of organic structures, cyclic compounds, and organisms. Visual learning. This organic chemistry model kit. 290 block includes: 136 atoms; 154 links; 3 tracks and 1 link removal tool; 150 block includes: 60 small atoms; 90 links. All atoms are color-coded according to common standards, which is very helpful for visually understanding and displaying the structure and molecular geometry of the compounds. Learning is fun and effective. This suite of chemical models includes atomic centers, bonds, and orbitals to help you understand chemical such as inorganic molecules, general empirical formula representations, and organic structures. and portable. Packaged in a sturdy storage box with four compartments for easy storage and portability. Easy to store and carry. Contains tools that make the task of breaking down the structure of the molecular atomic model kit super easy and fast. Nice gift. A great educational high school students, friends, classmates, and more. Colour:As Shown Material:PP Package Contents: 136 * atoms 154 * link 3 * track 1 * Link removal tool 60 * small atoms 90 * small link Only the above package content, other products are not included. Note: Light reflection 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.