Feature 13D Modeling: These molecular models show chemical structures, molecular bonds and bond angles in all directions. The 3D modeling study demonstrates basic molecular geometry, chemical molecular structure and stereochemistry. 2Easy to Learn: This chemistry molecular model kit adopts universal standard for each atom's color makes it easier for you to use and learn. 3Easy Disassembly: The atoms and chemical bonds of these molecular structure models combine tightly and firmly and can be easily disassembled by disconnecting tools. 4Colorful PP Balls: This molecular modeling kit adopts eco friendly PP material, vibrant colors and exquisite craftsmanship ensure longer service life. 5Increase Learning Interest: These organic chemistry models can increase students' learning interest and teachers can explain it more visually and conveniently.SpecificationItem Type: Chemistry Molecular Model KitMaterial: PPProduct Size: Approx. 21.3 x 16.5cm / 8.4 x 6.5in ( Manual Measurement, Slight Error May Exist ) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List57 x Atom1 x Storage Box40 x ShortBond16 x Double Bond