The Craft a Brew Small Drilled Universal Carboy Stopper is designed to create a secure seal on compatible glass fermenters while allowing carbon dioxide to escape through an airlock during fermentation. Its universal tapered shape fits multiple carboy sizes, making it a versatile brewing accessory for homebrewers and fermenters. Recommended for 3 gallon, 5 gallon, 6 gallon, and 6.5 gallon glass carboys, this drilled stopper helps support controlled fermentation while reducing the chance of oxygen or contaminants entering the vessel. The longer taper and integrated lip help create a snug fit that is less likely to slip or pop loose during active fermentation. Made from BPA-free silicone, this reusable fermenter stopper is compatible with standard fermentation airlocks and suitable for beer, wine, mead, and hard cider fermentation projects. Not recommended for 1 gallon carboys or The Catalyst Fermentation System.
