1Multi Purpose: These molecular models show chemical structures, molecular bonds and bond angles in all directions. Used to describe the structure of inorganic and organic molecules in chemistry textbooks. 2Easy Way 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, exercise hands on ability, expand spatial imagination.