The set can be used to make models of many organic molecules and also to illustrate various forms of isomerism in organic systems. Atom parts are made of solid plastic spheres and are available with from 1 – 6 holes in the usual angular orientations. The contains 50 atoms of Different colors, 26 short white links, 26 medium grey links 31 mm and 10 long grey flexible links 46 mm. 1 Link Removers Beige color. Packed in a suitable box with teaching notes.