You will receive 40 pieces of 2.8 inches/70mm outside diameter wide and regular mouth sealing rings, good combination and enough quantity to meet your different sealing use and replacement needs.Compatible with most mason jar, suitable for paired with most bottle, jar or glasses. Perfect for fridge and freezer storage, pantry storage, transporting food or beverage without leaking, home made fermenting lids, and much more. Not for use with canning clamp lid jars.WUWEOT replacement waterproof ring gasket is made of food-grade silicone. Silicone products have good weather resistance, no deformation or aging. Not easy yellowing, use this silicone airtight seal to replace your broken sealing rings.Suitable for sealing mason jars containing small objects such asfruits, cookies, candies, salad, milk, smoothies, tea, coffee, screws.The silicone sealing ring enables the lid of canning lids to be tightly sealed, ensuring that mason jar is suitable for keeping food and seasonings fresh without worrying about leakage. WUWEOT 40 pack 2.8 inches regular mouth sealing rings are made of food-grade silicone. Silicone products have good weather resistance, no deformation or aging. Not easy yellowing, use this silicone airtight seal to replace your broken one. The silicone sealing ring enables the lid of canning lids to be tightly sealed, ensuring that mason jar is suitable for keeping food and seasonings fresh without worrying about leakage.