Carboy Cap - Universal
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This convenient carboy cap will fit 3, 5 and 6 gallon carboys. It features a center spout designed to hold an airlock which will help protect against oxidation of your brew during fermentation. When it is time to transfer to a secondary fermentation container, you can simply use a racking cane in the center spout while blowing into the side spout to begin siphoning. You can keep the cap on!