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.
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