Drilled gum rubber stopper. Used to provide a positive seal on fermentors. Drilled hole is compatible with standard airlocks.
The #6.5 stopper works well with our glass carboys and Big Mouth Bubbler PET fermentor.
Top Diameter: 1.339"
Bottom Diameter: 1.063"
- Details & Instructions
Best Fit 6 Gallon Carboy Bottom Diam. 1 1/8"
3.0 / 5.02 ReviewsRubber Stopper is Too Small!No I actually do not like this stopper at all; it's too small for my Big Mouth Bubbler. Did I order the wrong one or did you send me the wrong one? The other 2 I received are much better and work perfectly. Too much of a hassle to return it, not worth the shipping cost and trip to the post office.June 6, 2018Purchased
10 months agoResponse from Midwest SuppliesI'm sorry to hear about your issues with the stopper and Big Mouth Bubbler. The 6.5 stopper is one of the 2 stopper options we suggest for the Big Mouth Bubbler. A member of our customer service team will be reaching out to you shortly.June 11, 2018Greggory G
- Customer Q&A