Feature: 1. Multi 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. 2. Easy 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. 3. Easy Disassembly: The atoms and chemical bonds of these molecular structure models combine tightly and firmly and can be easily disassembled by disconnecting tools. 4. Colorful PP Balls: This molecular modeling kit adopts eco friendly PP material, vibrant colors and exquisite craftsmanship ensure longer service life. 5. Increase Learning Interest: These organic chemistry models can increase students' learning interest, exercise hands on ability, expand spatial imagination. Specification: Item Type: Chemistry Molecular Model Kit Material: PP Product Size: Approx. 21.5 x 16.5 x 6cm / 8.5 x 6.5 x 2.4in ( Manual Measurement, Slight Error May Exist ). Package List: 116 x Atom1 x Storage Box1 x User Manual60 x Greyish White Single Bond20 x Dusty Blue Double Bond8 x Purple Single Bond18 x Purple Double Bond8 x Super Long Bond30 x Proportional Single Bond6 x Proportional Double Bond1 x Wrench