Silicone Airlock - Lactobacillus Fermentation Boss Valve

Make fermented foods simple and easy with this silicone boss valve. Ready to use in ferment jar or pickle lid, no preparation or water required for seal. Simply install the valve into any container you want to lacto fermented vegetables in in. It can be used for both fermentation and storage in the fridge.. It is great for pickling, kimchi, kombucha, kefir, sauerkraut, or storing anything that need an oxygen free environment, such as coffee beans or It will seal in any 0.625 (…) inch hole which is the standard size our other products use.