Foam Stopper 46-50mm

$3.49
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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 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 46-50 mm wide and fit our 2000 ml borosilicate glass flasks.

Additional information

SKU

42950

Customer Reviews

Based on 23 reviews
96%
(22)
4%
(1)
0%
(0)
0%
(0)
0%
(0)
L
Logan

Foam Stopper 46-50mm

R
Reese M.
Larger Foam Stopper

This came in handy when I had to use a 2000 ml beaker to start my yeast for an Imperial Red Ale. Easy to use and easy to clean.

M
Michael B.
Flask stopper

I use it for my yeast starter flask. When swirling the starter try not to let it touch the stopper because that stain doesn't come out.

M
Mike
Works perfectly

Fits my 2L flask i use for yeast starters perfectly. Makes a nice, tight fit that keeps dust out and lets the starter breath. as with any foam, these have about a 9 month lifetime for me, but i can soak up sanitizer, squeeze it out and let it work.

M
Mickey D.
Foam stopper

it is a foam stopper. What else to say. I use it in my yeast starter flask.

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Foam Stopper 46-50mm

Foam Stopper 46-50mm

Customer Reviews

Based on 23 reviews
96%
(22)
4%
(1)
0%
(0)
0%
(0)
0%
(0)
L
Logan

Foam Stopper 46-50mm

R
Reese M.
Larger Foam Stopper

This came in handy when I had to use a 2000 ml beaker to start my yeast for an Imperial Red Ale. Easy to use and easy to clean.

M
Michael B.
Flask stopper

I use it for my yeast starter flask. When swirling the starter try not to let it touch the stopper because that stain doesn't come out.

M
Mike
Works perfectly

Fits my 2L flask i use for yeast starters perfectly. Makes a nice, tight fit that keeps dust out and lets the starter breath. as with any foam, these have about a 9 month lifetime for me, but i can soak up sanitizer, squeeze it out and let it work.

M
Mickey D.
Foam stopper

it is a foam stopper. What else to say. I use it in my yeast starter flask.