You will receive 20 pieces of wide mouth silicone seals(10 pcs 3.39in + 10pcs 2.76in), good combination and enough quantity to meet your different sealing use and replacement needs. The outer diameter is 3.39inch/ 86mm and The outer diameter is 2.76inch/ 70mm, and 3.4mm (0.1") thick. suitable for most standard sized jars, glasses and canning. Replacement waterproof ring 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. Our 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. Suitable for sealing Mason jars containing small objects such asfruits, cookies, candies, salad, milk, smoothies, tea, coffee, screws.