These wide mouth mason jar fermentation lids are crafted with plastic and a secure fit to make sure optimal sealing during fermentation. The one-way valve design and allows gases to escape safely, making them ideal for fermenting lids for jars. Enhance your fermenting experience with tools that lock in freshness and flavor effortlessly. Features -Color:White -Material:Plastic -Size:13.00X9.00X9.00cm/5.11X3.54X3.54in -Safe and controlled fermentation: these mason jar fermenting lids feature a singledirection valve, ensuring a secure environment for fermenting without the risk of spoilage -Wide compatibility: designed to fit wide mouth mason jar lids, these fermentation lids are suit for 86 mm jars, providing a for optimal performance - and reliable: crafted from sturdy plastic, these wide mouth mason jar fermentation lids are built to withstand repeated use, making them a longterm fermentings -Flavor locking technology: the advanced sealing mechanism of these mason jar fermentation accessories helps retain the natural flavors of your fermented foods -Easy usage: these plastic fermentation lids simplify the fermenting process by reducing the need for constant monitoring, ensuring a seamless experience Package list: 2 x Mason Jars Fermenting Lids