Replacement lid for wide mouth glass carboys. Features a built-in airlock. Screw cap covers a 1" hole which will accept a #5 stopper if a traditional stopper and airlock is preferred. Made from polypropylene.
Airlock Lid Setup:
Twist off the small red cap
Twist on the small white cap
Pour water or sanitzer around the small white cap until it covers the blow-off vents