Features:1. Durable and Safe: The jar lid ring is made of BPA free food grade silicone. Safe to use, long-lasting durability.2. Airtight and Leak Proof: Creates an airtight, liquid-tight seal on most regular mouth/wide mouth Mason Jar to make fermenting and canning leak free.3. Reusable Lid Ring: These seals are dishwasher, freezer, and microwave safe! They can be used over and over again.4. Many Uses: Perfect for fridge and freezer storage, pantry storage, transporting food or beverage without leaking, homemade fermenting lids, and much more! Unique Design Reusable Silicone Seals for Mason Jars.5. Applications: Our seals are the perfect size to seal the freshness into your mason jar. Suitable for plastic storage caps, stainless steel storage lids, and many other lids.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow slight deviation due to manual measurement.Specification:Type: Silicone Airtight Sealing Rings for Mason Jar Lids Diameter: 70mm/86mm optionalQty: 1/5/10Pcs optional