When filled with water allows Co2 gas to bubble out and prevents air from getting in. Enclosed design allows for slower evaporation from airlock bubble. Package contains 2 twin bubble airlocks and 2 universal carboy bungs that will fit 3, 5, 6 and 6.5 gallon glass carboys.
- Twin Bubble Airlock with Carboy Bung
- Set of 2
- Allows for slower evaporation
- Universal Carboy Bung for 3, 5, 6 and 6.5 Gallon Glass Carboys
- Bung will not fit Plastic Better Bottle Carboys