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Coldbreak Brewing 3/8" stainless steel blow-off tubes are perfect for the brewing bucket or glass carboys. No more re-filling the sanitizer in your air locks. No floating tubing. No leaking sanitizer into your fermenter. Just add a smaller bowl or jar with sanitizer. Use one bowl of sanitizer for multiple fermenters. We recommended that worn out lid grommets and carboy bungs be replaced for an air tight seal.