Fermenting Kit For Wide Mouth Mason Jars: The Fermentation Kit includes 3 wide-mouth fermentation lids and an oxygen extractor pump; Ideal for making sauerkraut, kimchi, pickles, and more, this kit provides all you need for successful home fermentation Durable and Reliable: Each airlock fermentation lid is crafted from durable, food-safe plastic and features a leak-proof gasket for an airtight, fitted seal; Ferment with confidence, knowing your food is safe and secure from unwanted air Transform Any Jar: Turn any wide-mouth mason jar into a fermenting machine with Easy Fermenter; These versatile fermentation lids and the oxygen extractor pump work together to ensure a perfect ferment Oxygen Extractor Pump: The included oxygen extractor pump removes excess air from the mason jars, ensuring a fresh and healthy ferment; Prevent any unwanted air with the pump and the airlock fermentation lids About Us: At Easy Fermenter, we're passionate about fermentation; We understand the frustration of burping jars so we've created a revolutionary solution to perfect your harvest with ease; Simplify your fermentation process with Easy Fermenter !