Description Designed for wide mouth mason jars, these plastic fermentation lids feature a one-way airlock valve that make sure a safe and controlled fermentation process. The innovative design minimizes air exposure, preserving the original flavors of your food. suit for fermenting mason jar lids, these accessories simplify the process while maintaining the purity of your ingredients. Features -Color:White -Material:Plastic -Size:13.00X9.00X9.00cm/5.11X3.54X3.54in -Oneway airlock design: the fermentation lids for mason jars feature a oneway airlock valve, ensuring a safe and controlled fermentation process while preventing contamination -suit fit for wide mouth jars: designed for 86 mm wide mouth mason jar lids, these fermentation lids provide a tight seal, keeping your ingredients pure and fresh during fermentation -Enhanced durability: made from plastic, these mason jar fermentation lids are built to last, ensuring reliable performance for all your fermenting needs -Improved flavor preservation: the innovative lid design locks in flavors, making these wide mouth fermentation jar lids ideal for preserving the taste of your fermented foods -Simplified fermentation process: with these fermenting lids for jars, there's no need for frequent lid removal, reducing air exposure and maintaining the original flavor of your foodPackage list: 2 x Mason Jars Fermenting Lids