The Eisco Labs 59-Atom Molecular Model Set includes durable plastic atom parts ranging from 15mm to 20mm in size, along with various links for assembling different molecular structures. The set comes in a four-compartment plastic storage case for organized storage and transport. This model set allows students to build three-dimensional representations of basic inorganic and organic molecules, reinforcing concepts in molecular geometry, bonding, and chemical structure. Suitable for chemistry classrooms and individual study at the introductory level.