Description:

The Livingstone Rubber Stopper with One Hole is crafted for versatile sealing applications in laboratory and educational settings. With precise measurements—15mm base diameter, 18mm top diameter, and 20mm height—this stopper fits snugly into standard test tubes and glassware openings, providing an airtight seal that helps prevent chemical leaks and evaporation.

Constructed from resilient laboratory-grade black rubber, the stopper resists chemical degradation and withstands repeated insertions and removals without losing its shape. The single centered hole allows easy integration of tubing or probes, making it ideal for closed-loop experiments, gas exchanges, or solution transfers in controlled setups.

Its flexible yet firm grip ensures containment in fluid-handling procedures, and the pack of 10 enables convenient restocking for labs that require consistent performance and safety. Whether used in chemistry classrooms or professional research facilities, this stopper supports safe and efficient laboratory workflows.