Foam Stopper 46-60mm

$1.79

SKU# 7098

Flat Rate Shipping only $7.99 only from Northern Brewer
Breathable foam stoppers will withstand boiling or autoclaving temperatures, making them ideal for use in preparing a yeast starter. The honeycomb structure of the foam stoppers will act is a filter for any airborne bacteria or wild yeast that might enter the flask. The large foam stoppers are 46-60 mm wide and fit our 2000 and 5000 ml borosilicate glass flasks.
Total:
$1.79

Availability: In stock

Foam Stopper 46-60mm

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  • Foam Stopper 46-60mm
Product Details

Breathable foam stoppers will withstand boiling or autoclaving temperatures, making them ideal for use in preparing a yeast starter. The honeycomb structure of the foam stoppers will act is a filter for any airborne bacteria or wild yeast that might enter the flask. That's important because a lot of air is sucked into the flask while it is cooling. You can also leave the stoppers on the flask instead of a fermentation lock. Some people use foam stoppers to replace fermentation locks in their carboys, too.

The large foam stoppers are 46-60 mm wide and fit our 2000 and 5000 ml borosilicate glass flasks.

Additional Information
Support Documents:No
SizeNo
Reviews
3.8 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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Great fit for 2000ml flask
Fits my 2000ml flask great.
July 13, 2012
It Works
It's a foam stopper that fits the 2000 ml flask. There really isn't much more to say.
October 22, 2013
It's a foam stopper.
It's Foam. It stops.
September 16, 2016
nice tight fit
Not much to review as its a hunk of foam. It does fit my 2000ml flask just right. Its tight and it washed out easily.
June 9, 2016
Almost perfect
The description states that this fits either 2000 or 5000 mL flasks. I have a 2000 mL flask and this stopper tends to pop out when I'm not looking. It's honestly too big for a 2000 mL flask. You have to position it in there just right or you'll wake up and have an uncovered starter. Other than that, once you find the sweet spot, it does its job.
August 2, 2016
Missing a foam stopper
Well, I checked the box. Found missing one of the stopper. Everything else are very well packed.
August 15, 2016
Response from Northern Brewer
I am very sorry about the missing stopper from your order. I am having a replacement shipped out to you right away. I hope this helps!
November 21, 2016
Northern Brewer N
Pops out of 3L flask
Maybe it's due to it being a new stopper and the foam is still rigid and has only somewhat softened up yet after a few uses. It worked it's way out of my 3L flask overnight the first time I used it which let a fruit fly in. The last couple of times I've used it I've covered the foam stopper with tinfoil and wrapped an elastic around it almost defeating the purpose.
September 24, 2016
bad fit for 2000 ml flasks
too big for 2000 ml flasks... it will fit with squeezing, but this causes creases/change in shape in sides of stopper and it doesn't seal the mouth of flask cleanly
March 1, 2012
Response from Northern Brewer
Chris,

I'm sorry you had trouble getting this stopper into your flask. The 46-60mm foam stopper is a much better fit for a 5L flask. The 46-50mm is the one that works great for the 2L ones. That extra 10mm can cause you to need to fold it a bit like you described. If you give us a call or an email we'd be happy to send you out the smaller one for free if you pay the shipping or add one on to an order for you.
November 21, 2016
Northern Brewer N
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