Spare Molecular Model Parts, Pack of 10

Details:

The red balls with 2 holes each (at 90° from one another) are parts of molecular model sets (which are used to provide a visual and kinesthetic aid for studying the structure and properties of various molecules). This 10 pack provides extras of this specific part (red balls with 2 holes each (at 90° from one another) for addition to a full set or to replace lost parts.