BPA free food grade silicon airlock for wide mouth jars. This silicon disks replaces the metal disk in your jar ring lid until the fermentation process is complete. When fermentation is complete, simply swop out with the normal disk and refrigerate or store as usual. The airlock ensures that gasses that build up during fermentation can escape without allowing outside air into the jar.
90.9 mm diameter wide mouth jars
3-4 weeks depending on shipping and customs