Learn chemistry by putting the elements together to create a visible structure to learn from! This is an excellent set for students ranging from middle to university. The flexible plastic bond allow for easy demonstrations of double bonds and triple bonds. The molecular model set is ideal for the use of studying simple organic and inorganic molecules. The molecular model set contains a number of different colored plastic spheres to represent various atoms. The atoms have holes at specific angles to accept plastic rods representing covalent and ionic bonds. The set allows you to build structural models of over 40 compounds. Set includes 84 plastic spheres 17-23mm in diameter, and 2 metal atoms-17mm in diameter. Bonds are 60 medium connectors, 68 short connectors and 10 long flexible connectors. The set also includes a plastic storage with a lid, four compartments, bond disconnection tool and an instruction manual. Made of durable and colorful plastic, excellent for visual display Double and triple bonds are easily made with flexible bonds Many elements are available to create various organic and inorganic compounds Molecular geometry and bond angles can be visibly seen in the structure, making it great for studying Excellent molecular model kit for students studying chemistry in middle or university