Home brewers and fermenting fans, listen up! These Ziliny wooden carboy stoppers are a game-changer. Made from solid oak, each stopper is polished and shaped to fit 1, 3, 5, and 6 gallon glass jugs perfectly. They create an airtight seal that keeps oxygen out, which is key for brewing beer, making wine, or fermenting foods. Unlike plastic, wood is natural, boilable, and sterilizable – so you keep things clean and your flavors intact. The pack includes 2 stoppers, each about 1.3 x 0.87 x 1.57 inches. Note: because it’s natural wood, small holes or variations are normal and actually help maintain a good seal. Just measure your carboy opening before ordering to ensure the best fit. Ditch the plastic and go natural for better results and a more authentic brewing experience!