These popular molecular modelling sets can be used to make many different molecules. Designed for teachers, this set contains 111 colour-coded atoms and 140 links. The medium links can be used for single bonds, while the longer, flexible links can be used for double or triple bonds. Short links can be used to create compact models. Using molecular models can help students to visualise concepts such as isomerism through hands-on learning. The models can also be used to learn about balancing equations and molecular geometry. Molymod is a registered trade mark of the EU ( and other places) and is owned by Spiring Enterprises Limited who are the inventors and exclusive manufactureres of the molymod system. Made In England. NOT AVAILABLE IN NORTH AMERICA AND CANADA