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Rubber Stoppers - Drilled

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Rubber Stoppers - Drilled

SKU: 6100x

Rubber stoppers with a hole drilled in the center, perfectly sized to accept airlocks or what have you.
Product Name Price Qty
No. 5 Stopper - Drilled
No. 6 Stopper - Drilled
No. 6.5 Stopper - Drilled
No. 7 Stopper - Drilled
Size 10 Stopper - Drilled

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Rubber stoppers with a hole drilled in the center, perfectly sized to accept airlocks or what have you. All suggested "Best Fits" are for new carboys purchased from Midwest Supplies. If you've got an older carboy, jug or bottle, be sure to measure the mouth and use the dimensions provided.
Details & Instructions

Additional Information

4.9 / 5.0
33 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Good quality, cheap price. Nothing can go wrong with it unless you lose it :) _x000D__x000D_Remember, size 10 for your better bottles
October 3, 2012
Solid Is Best
Okay, My shop NEVER had the right size, So I got a "universal bung" they work but they trap dust in the cup and spillage from the occasional over foam in the lock. Solid bungs are easier to clean and hold the heavier, glass airlocks better.
November 18, 2012
Long lasting and good product
I'm not sure what type of rubber these technically are, but they are dense, heavy, and very firm. Excellent quality. They don't seem to roughen up or breakdown over time._x000D__x000D_The only issue I've had is that you have to make sure the stopper and the neck of the bottle/carboy is very dry or they can creep up and out.
November 27, 2012
Best stoppers around
I like these stoppers better than other drilled stoppers. They seem to stick in the neck of the carboy very well and the airlock stays in solidly. I recommend.
December 28, 2012
Used for a 6.5 Gal Glass Carboy
These are solid bungs and are easier to clean. They hold the heavier, glass airlocks better. Since I keep beer in these for a year or more, that is critical to me.
January 10, 2013
Great to plug a hole
I have used these since the start of my brewing and they work great to keep out air. If you like simple and easy than these are for you.
January 12, 2013
For my 1 gallon experiments
These a durable and wont get roughed up and abraded over time. Dense and firm. Just make sure the mouth of the jug or carboy is not wet when you place in the plug,
January 28, 2013
Holds the grip well
The stopper is Excellent quality, its dense and firm. They hold the grip on the carboy well, and are air tight.
February 12, 2013
Nice and grippy
I've used both the universal stoppers and the drilled rubber stoppers. While it is annoying to have to find the right size stopper to fit your carboys (especially when dealing with abnormally sized carboys) the drilled rubber stoppers are made of a lovely solid grippy material. As long as the carboy mouth is dry when you put it in, there are no worries about one of these popping out.
February 19, 2013
Seals well
The stopper grips well, just make sure it's not dripping wet. Just make sure not to jam it in too hard or you will have a hard time getting it out.
February 27, 2013
Customer Q&A
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Browse 8 questions Browse 8 questions and 6 answers
The 6.5 stopper is that for the 6.5 garboy and 10 for the 10 gallon, etc
D E on Nov 28, 2015
BEST ANSWER: Hello Dennis

here's a helpful guide to stopper sizes:

Stopper Type Compatible With:

No. 2 Drilled Stopper Standard Beer bottles

No. 5.5 Drilled Stopper Big Mouth Bubbler® EVO 2 (5 gallon

6.5 gallon & Little BMB)

No. 6 Stopper Drilled or Solid 1 Gallon Jugs

No. 6.5 Stopper Drilled or Solid Glass carboys & Big Mouth Bubbler® plastic (5 or 6.5 gallon). Ideal fit is 6 gallon carboy.

No. 7 Drilled Stopper

& 5 Gallon glass carboys

No. 10 Drilled Stopper Bubbler® 5 or 6 gallon

Small Universal Stopper - Drilled or Solid Glass Carboys (3



6.5) & Big Mouth Bubbler® Plastic 5 or 6.5 gallon

Medium Universal Stopper - Drilled or Solid Bubbler® 5 or 6 gallon
Can you tell me what size the hole that's drilled in the stopper is?
A shopper on Apr 2, 2017
I have Better Bottle plastic carboys, both 5 & 6 gallon, and they have the same sized opening - 4.4 cm (1 3/4 inches) - which is the appropriatr stopper?
J E on Sep 12, 2016
BEST ANSWER: The Better Bottle carboys, and our similar "Bubbler" carboys will use the "Medium Universal Stopper" ( SKU 40490 ) or a #10 stopper ( SKU SD10 ) They are also available in an undrilled style. -Mike W, Midwest Supplies
What is the stopper size that fits the 6 gallon plastic carboy? some say #7 and some say #10 ?
M N on Aug 2, 2016
BEST ANSWER: If looking at The Bubbler 6 Gallon Plastic carboy, you want a #10 stopper.

If looking at our Plastic Big Mouth Bubblers or standard glass carboys, want a #7,
What size stopper fits a regular gallon jug?
J A on Jul 28, 2016
BEST ANSWER: The number 6 fits the 1 gallon jug that we sell, but different styles of jugs can ave different size openings. For these, you'll want to refer to a stopper sizing chart (you can find them with a quick google search), or let us know the diameter of your jug's opening and we can let you know which one will work for you.
what is the size of the #6 stopper?
T C on Feb 9, 2016
BEST ANSWER: No.6 stopper dimensions:

Top Diameter: 1.26"

Bottom Diameter: 1.024"

Length: 1"
Where do I find the sizes in inches or mm?
Harry D on Jan 27, 2016

We don't have that info on our site, but here's a chart that I refer to often:

Let me know if there's anything else I can help with. Cheers!

what size fits a 3 gallon carboy?
A shopper on Jul 2, 2017

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