This bored tapered bung provides a sealed opening for fitting a compatible fermentation airlock to a barrel or vessel. It measures approximately 19mm at the narrow end and 27mm at the wider end.
Check the fit before ordering
- Tapered diameter: approximately 19–27mm
- Central bore for a compatible airlock
- Suitable only for vessel openings within its fitting range
Measure the vessel opening and the airlock stem before ordering. The bung should sit firmly without dropping through or needing to be forced into place.

Rubber stopper with airlock hole 




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