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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 11 reviews
91%
(10)
9%
(1)
0%
(0)
0%
(0)
0%
(0)
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

C
C.C.
Pretty solid

Works very well in my beaker when making starters. But I don't really know how to clean it after each use. I just dunk it in sanitizer and hope it's clean. Came with no cleaning instructions which is why I rated 4/5*

D
D.A.
Perfect for 2000 ml flask

Perfect for 2000 ml flask

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