These reusable plastic white foam plugs are for use with test tubes and flasks.

• Provides a snug fit, yet permits free air flow
• Proven nontoxic to algae
• Breathable and non-absorbent
• Autoclavable
• Chemical resistant
• Springs back to original shape after repeated use

These plugs can also be used as a cleaner for lab pipettes, tubes, and vials, as well as industrial precision tubing.