FOOD GRADE MATERIAL Made of 100% food grade silicone, and 304 stainless steel, BPA free, mold free and odorless.
FITS All WIDE MOUTH MASON JAR With a size of 3.35 diam, each lid is perfectly fit for all wide mouth mason jars. Vent gas automatically. No need to burp jars or maintain water levels in airlock.
PERFECT FOR FERMENTING Great for making Sauerkraut, salsa, Pickles, Kimchi, even fruits or any fermented vegetable probiotic foods.
EASY CLEAN UP Flexible silicone lids gets cleaning done fast and efficiently on both dishwasher and hand washing, and keep clean.
100% GUARANTEED We are confident of our product and know you will like it, just in case you are not satisfied with the product, you can return it for a 100% refund of your money for 3 month.