Whether you have a 3, 5, 6, or 6.5 gallon glass carboy, this Buon Vino stopper will give you a snug fit and reliable seal. It is drilled for use with an airlock, and features a lip that prevents it from falling into your carboy.
Note: Not compatible with Better Bottle PET Carboys. For plastic carboys, an intermediate Buon Vino stopper will be needed.