This medium rubber bung stopper will fit all sizes of PET better bottles and most other plastic fermentation bottles as well. Made of sturdy but pliable rubber, this stopper also has a rubber lip at the top to prevent it slipping into the carboy. Its concave in the center to push deeper into the carboy for a better seal and less chance for contamination.
- Fits all sizes Better Bottle
- Made of pliable rubber
- Concave center
- Top lip to prevent slippage