Carboy Silicone Bung for 5 gallon Plastic Carboy Fermenter - hole for airlock
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This carboy bung is suitable for the 5 gallon PET carboy fermenter.
It has a hole to fit an airlock.
The carboy bung diameter increases from 42mm to 50mm
Centre Hole: 9mm diameter
The bung is made from food grade silicone.