Airtight seal prevents oxygen entry and contamination for clean fermentation
Durable, flexible rubber construction ensures long-lasting performance
Standard 6.5 inch size with 3/8 inch pre-drilled hole fits most airlocks and tubing
Reusable design maintains a tight seal after repeated use
Easy to install and remove for convenient maintenance
Summarized by Shop
Seal your fermenter securely with the Craft a Brew #6.5 Carboy Rubber Stopper, a durable brewing bung designed for 1 gallon fermenters, airlocks, and blow-off tubing setups. This food-safe rubber stopper creates a tight seal during fermentation while supporting proper CO2 release through compatible airlocks or transfer tubing. Designed to
Material
Flexible rubber
Size
6.5 inches
Pre-drilled hole
3/8 inch
Compatible with
One gallon glass carboys and Catalyst fermentation system lids
Intended use
Homebrewing, winemaking, cider, mead
Summarized by Shop
4.9
37 ratings
5
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3
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1
Good Stopper!
Great item. The only problem is that the transfer tubing, which I use for the furst few days of fermentation, doesn't really fit in the hole and I must distort and stuff it in. It would be nice if they matched.
P
Peter · May 14, 2024
Its a stopper. Pretty much it. Fits the 1 gallon glass carboys really well.