Universal Glass Carboy Breathable Bung

• Revolutionary Silicone Stopper: This unique stopper serves as both a stopper and an airlock, offering a game - changing solution for fermentation! • CO2 Management: Allows CO2 pressure to escape while keeping oxygen and airborne contaminants out. It creates a vacuum when fermenting wort cools. • Versatile Fit: Fits 3, 5, 6 & 6.5 gallon glass carboys, 1 gallon bottles, growlers, and 500 mL flasks. Replace stopper sizes #6, #6.5, #7, #8. Get your hands on this must - have product for successful fermentation!

This breathable silicone bung is perfect for homebrewers and fermentation enthusiasts. It can be used when fermenting beer, wine, or other fermented beverages in various containers like glass carboys, bottles, and flasks. The stopper measures 0.94' x 1.48' (24mm x 37.5 mm) and the flapper stopper protrudes roughly 2.5' from the stopper for easy assembly.