- Made of high-quality borosilicate glass.
- Hexagonal head prevents rolling.
- Flat surface allows for inverted storage.
- 24/40 ground glass joint ensures a tight seal.
- Hollow design makes it lightweight and easy to handle.
This hexagonal head borosilicate hollow glass stopper has a 24/40 ground glass joint and is 2-1/2 inches in height, making it ideal for use with a variety of glassware.
The stopper's hexagonal head prevents it from rolling off your benchtop, and the flat surface allows you to invert it and place it on end, preventing possible contamination of the ground glass surface.