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Feature

3-piece airlock
Cylinder airlock
#7 stopper / bung with airlock hole

Description

3 piece airlocks with #7 rubber stoppers. Use this airlock and stopper in your fermenter to create a closed system that allows CO2 out and prevents harmful bacteria from getting in. Fill to the marked line with sanitizer or boiled water. Use with a drilled stopper. These stopper fit most gallon jugs and 38mm screw cap jugs.