Features: 1. Durable and Safe: Made of BPA free food grade silicone. Safe to use, long-lasting durability. 2. Airtight and Leak Proof: Create an airtight, liquid-tight seal on most regular mouth/wide mouth Mason Jar to make fermenting and canning leak free. 3. Reusable: 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. 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 optional Color: as picture show Qty: 1/5/10Pcs optional includes: Choice 1: 1 x Sealing Rings Choice 2: 5 x Sealing Rings Choice 3: 10 x Sealing Rings