Carboy Rubber Cap for 5 gallon Glass Carboy Fermenter - hole for airlock
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This carboy cap is suitable for the 5 gallon glass carboy fermenter.
It has a hole to fit an airlock.
The carboy cap fits over the neck. It has an internal diameter of 50mm and has some stretch to make an airtight seal.
Centre Hole: 8mm diameter which will expand to fit an airlock.
The bung is made from rubber.