Product information "Must Cap, no hole 10 / 15 / 25 l, size 4a"
This fermentation cap with hole in size 4a is suitable for bottles of 10, 15 and 25 litres in size. The cap is made of hygienic, food-safe rubber and sits securely without slipping. It seals the bottle so that no oxygen, bacteria or impurities can get in.
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