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Foam Stopper 46-50mm

$3.49
& Free Shipping over $40 Details
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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 13 reviews
92%
(12)
8%
(1)
0%
(0)
0%
(0)
0%
(0)
C
C.

It is foam and it does stop, so I must give it 5 stars...

C
C.J.
Worked just as advertised

Not much else to say, needed it for a flask, worked perfectly.

R
R.M.
it is what it is

I found this will fit into most any flask from my 1l upto 3l.

j
j.k.
Great

Actual diameter just under 50mm or about 1-15/16".

J
J.N.
Works perfectly

Works perfectly. Allows the starter to breath and keeps the nasty stuff out

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Foam Stopper 46-50mm

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