Features: COMPLETE MOLECULAR MODEL KIT. This model kit for organic chemistry are used to make organic structures, cyclic compounds, and biology models. VISUAL-LEARNING. This organic chemistry model kit. 290 PIECES includes: 136 atoms; 154 links; 3 orbitals and 1 link remover tool; 150 PIECES includes: 60 small atoms; 90 links. All atoms are color coded to universal standards, very helpful visually understand and demonstrate the structure of compounds and molecular geometry. FUN AND EFFECTIVE TO LEARN. This chemistry model kit with atoms centers, bonds, and orbitals helps you understand chemistry concepts like inorganic molecules, general empirical formula representations, and organic structures. LIGHTWEIGHT, PORTABLE. Packed in sturdy storage box with four compartments for storage and portability. Easy to store and carry. Rremover tool included to make the task of dissembling your molecular atoms model kit structures super easy and fast. NICE GIFT. Great educational present for high school student, friends, classmates, etc. Specifications: Color: Multicolor Box Size: Approx. 23.5x17x7cm/9.25X6.69x2.75in Weight: Approx. 950g Material: PP Note: 1.Please allow 0-1cm error due to manual measurement. make sure you do not mind before you bid. 2.Due to difference between different monitors, picture may not reflect actual color of this item. Package includes: 444 Pieces Molecular Model Kit