Jaece Identi-Plug® Plastic Foam Plug, 14-20 mm Diameter, 1,000/Case

These plugs are designed for use with test tubes and flasks. They provide a snug fit while allowing for free airflow. They are proven to be nontoxic to algae, breathable, and non-absorbent. Additionally, they are autoclavable and resistant to chemicals. The plugs return to their original shape after repeated use. They can also be utilized as a cleaning tool for lab pipettes, tubes, and vials, as well as for industrial precision tubing.