Breathing Cover[Product Information]- ★DON'T SETTLE FOR IMITATIONS - Our waterless airlock valve technology lets carbon escape. But also makes sure zero oxygen can enter. So no exploding jars that need burping. And most importantly - no mold. We have even included a extractor pump to suck out the oxygen during the later stages of your ferments. All this without having to deal with those clunky 3 piece water filled airlocks.
