Eisco Labs Molecular Model Part; Blue Ball; 2.2cm; 4 Holes; Pk of 10

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