Plastic Construction: Made from plastic, these Mason Jar Fermentation Lids are built to last. They are strong, , and safe for all your fermentation needs, long-lasting performance and reliability. Easy to Use: Our fermentation lids feature a user-friendly design that allows for quick setup and hassle-free fermentation. The airlocks effectively release gas while preventing oxygen from entering, ensuring a perfect fermentation process every time. Easy to Clean and Maintain: Designed for convenience, these fermenting lids and airlocks are easy to clean. Simply hand wash with warm soapy water, and they are ready for your next batch of delicious homemade fermented foods. Complete Fermentation Kit: This set includes 6 fermenting lids and 6 airlocks, providing everything you need to start fermenting your favorite foods right away. Designed for regular mouth mason jar (2.76"), these lids are perfect for home fermentation enthusiasts. Versatile Applications: Ideal for fermenting a variety of foods such as sauerkraut, kimchi, pickles, and more. Whether you're a seasoned fermenter or a beginner, this Fermentation kit is a versatile addition to your kitchen.