Ferment N' Joy Fermenting Lid Kit with Airlocks for Wide Mouth Mason Jars, Pack of 3 IMPROVED FERMENTATION PROCESS - Each fermenting lid allows carbon dioxide to escape airlocks naturally, creating a natural, odor-free lacto process. UNIVERSAL FIT - A versatile fermenter system, these lids with airlocks fit standard wide-mouth mason jars, including Ball, Kerr and Golden Harvest. CLEAN, HEALTHY EATING - Create home grown, delicious fermented vegetables and side dishes like sauerkraut, kimchi or pickles for organic eating! SMALL BATCHES - With three lids you can create small, consistently fresher food that's good for you and your family. It also makes it quick and easy to clean. SATISFACTION GUARANTEED - Every fermentation lid kit is made with superior materials and backed by a 100% money back guarantee for satisfaction.