AIRTIGHT SILICONE RUBBER GASKET The replacement silicone gaskets for glass canisters create an airtight, liquid-tight seal on most standard-sized preserve and canning jars. The silicone rubber rings can be used for leak proof sealing to keep your fruits, vegetables, jams, sauces, herbs and beef jerky preserved. It's handy to have several available replacements especially during canning season. FIT WELL The airtight silicone seal rings fit standard regular mouth mason jar lids (3 inches lids), no matter it is for 0.35 Liter, 0.5 Liter, 1 Liter, 1.5 Liters, or 2 Liters container. The inside diameter is 70 mm, the outside diameter is 97 mm, and the thickness is 2.2 mm. Being soft silicone, the gasket sealing rings for mason jar lids will stretch slightly to fit snug. REPLACEMENT SILICONE SEALS RINGS The old rubber seals are easy to wear out after a long time use, use these replacement silicone gasket to replace your old or damaged sealing rings for glass airtight sealed food jars. These new ones will work wonderfullywell. BPA FREE & DURABLE The airtight fitting seals are made of eco-friendly silica gel with long-lasting durability, which is very safe for you and your family to use. They are BPA free, freezer safe, heat tolerant, reusable, durable, and will not absorb flavors and odors. MULTIFUNCTIONAL The replacement canning silicone gaskets are great for everyday storage, on the go and travel, and storage of dehydrated food. Perfect for fridge and freezer storage, pantry storage, transporting food or beverage without leaking, home made fermenting lids and much more.