This Molecular Model Kit contains 127 pieces and is perfect for those interested in organic chemistry. The kit includes a variety of atoms and bonds to create different molecules. It is a great tool for studying science and nature, particularly in the field of chemistry. The kit has been previously enjoyed by its owner, but is still in excellent working condition. It comes with a sturdy carrying case and all necessary pieces for assembling various molecular structures. Use this Molecular Model Kit to enhance your understanding of organic chemistry and explore the intricate world of science. Contains 22 Hydrogen atoms, 4 Halogens, 1 Metal, 14 Carbon, 6 Oxygen, 2 Nitrogen, 2 Sulphur, 1 Phosphorus. 28 short bonds, 30 medium bonds, 12 long bonds. 1 remover tool. 1 box with lid.