These wide mouth mason jar lids are tailored for fermentation, featuring -way valve that make sure a controlled environment for your food. Made from plastic, they are ideal for fermenting lids for mason jars, offering a tight seal that locks in flavors and prevents unwanted air exposure. Simplify your fermentation process with these reliable accessories. Features -Color:White -Material:Plastic -Size:13.00X9.00X9.00cm/5.11X3.54X3.54in -Secure valve: the plastic mason jar fermentation lids feature a that make sure a controlled fermentation process, keeping your food safe and uncontaminated -Wide mouth compatibility: these wide mouth fermentation jar lids are specifically designed for 86 mm mason jars, offering a suit fit for effective fermenting -Robust and : constructed from plastic, these mason jar fermenting are built to last, providing reliable performance for all your fermentation needs -Flavor retention: the advanced sealing design of these mason jar fermentation supplies helps lock in the natural flavors of your fermented foods -Effortless fermentation: these fermentation lids for jars simplify the process by reducing the need for frequent checks, ensuring a easy experience Package list: 2 x Mason Jars Fermenting Lids