Drilled gum rubber stopper. Used to provide a positive seal on fermentors. Drilled hole is compatible with standard airlocks.
Our rubber stoppers are manufactured from a premium-grade material. This makes the stopper soft, pliable and long lasting.
Top Diameter: 1.457"
Bottom Diameter: 1.181"
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Best Fit 3, 5 & 6.5 Gallon Carboys Bottom Diam. 1 3/16"
4.5 / 5.02 ReviewsGreat valuePerfect size for my 6.5 carboy, comes drilled for an airlock, and is only a buck. What more could you ask for?December 13, 2012Just a tad too small for 5 gallon carboy.I typically use medium universal bungs with my airlocks and blowoff tubes. The carboy I bought stated that I needed size 7 stoppers for it; the stopper seems to be a little small for the 5 gallon glass carboy, but they do work. I also use one at the opposite end of the blowoff tube to keep the tip submerged in sanitizing solution for the first couple of days before I swap over to airlocks.December 29, 2012
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