Specifications: Suitable for teaching or laboratory use. Set for General and Organic Chemistry, can be used to build organic molecular structure model and the ball-and-stick molecular structure model. It applies in building virtually all simple molecular models encountered in general and organic chemistry. This item comes with 116 atoms, 115 connecting bonds and 1 key opener. Made from PPandLDPE plastic, environmentally friendly, lightweight and convenient for using. Equip with a sturdy plastic case for storage. Type: Organic Chemistry Molecular Models Kit Material: Plastic Features: Durable, Assembly, Educational Toy Size: 22cm x 18cm x 6cm or 8.66andquot x 7.09andquot x 2.36andquot (Approx.) Notes: Due to the light and screen setting difference, the itemand 39 s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Organic Chemistry Molecular Models Kit (116 Atoms and 115 Bonds)