The 20mm purple link can be used to represent weaker ionic & hydrogen bonds instead of the stronger 20mm grey covalent bonds. They are used in the Molymod ice structure molecular model to indicate the sharing of hydrogen atoms with adjacent oxygen atoms.
Why do educators choose Indigo® Instruments models? We've kept inventory of genuine Molymod atoms & bonds for over 30+ years. These parts are compatible with every set & kit we have sold since day 1. Their quality may appear expensive, but no parts support from other vendors costs even more.
Use only these genuine Molymod Atoms & Bonds for full compatibility with any of our Molymod Molecular Model Sets & Molymod Molecular Model Kits.
Here is a short clip demonstrating the high-quality fit of the genuine Molymod 20mm bonds.