The purple 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 (purple balls with 4 holes each) for addition to a full set or to replace lost parts.
The purple 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 (purple balls with 4 holes each) for addition to a full set or to replace lost parts.