Our airtight silicone canning jar seal can be used for leak-proof sealing to always keep your foods fresh and dry. These replacement canning jar gaskets are made of food-grade silicone gel material that is safe and odorless to your foods. They are also freezer safe, heat tolerant, and reusable. The super usability makes them the must-have silicone seals for glass jars. It's easy to care for these silicone jar gaskets. When they need to be cleaned, you just need to add a little cleaning liquid and wash them with warm water. When the replacement silicone seal rubbers wear out after a long time of use or during canning season, it's handy to have several available replacements. Our airtight silicone gasket sealing rings help to keep your fruit, vegetables, jams, sauces preserved. These airtight sealing rings are universal. The inside diameter of each is 70mm (2.75in), and the outside diameter is 95mm (3.75in). Being soft silicone, the gasket sealing rings for mason jar lids will stretch slightly to fit snug. It is suitable for most ordinary mouth cans or jars. Good to store your fruit and vegetables, self-made food, toiletries, paint, hand-made products, and more.