- Part of a Molecular Model kit
- Gray Ball
- 4 Holes
- Pack of 10 Balls
The gray balls with 4 holes each 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 (gray balls with 1 hole each) for addition to a full set or to replace lost parts.





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