EISCO 114 piece organic chemistry molecular model student set. Detailed instructions included with each Student Set. Comes in a 4 compartment box. Contains 50 atoms - 12 Black carbon (4 holes), 20 White hydrogen (1 hole), 6 red oxygen (2 holes), 4 blue nitrogen (4 holes), 4 green halogen (1 hole), 2 yellow sulphur (6 holes; 4 holes), 1 purple phosphorus (4 holes), 1 gray metal (1 hole) and 64 links - 26 Gray links (28-millimeters), 12 Gray links (43-millimeters) and 26 White links (28-millimeters) and 1 assembly tool. The links provided can make single, double, and triple bonds; link removal tool included as well. Create hundreds of different structures. Grades 9-16. For ages 14-21.