Vented Silicone Bungs

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Vented Silicone Barrel Bungs – Allows CO2 to escape and prevents Oxygen from entering Great for use during fermentation and aging Made in USA Three Sizes Available! Standard – Bott om Diameter: 1.75 inches; Top Diameter: 2.375 inches #13 Bung – Bottom Diameter: 2.125 inches; Top Diameter: 2.875 inches #9 Bung – Bottom Diameter: 1.5 inches; Top Diameter: 2 inches Show more