Durability and Safety: Non-adhesive silicone rings are made from food grade silicone and do not contain Bisphenol A. Leave no chemicals behind. Durable and long lasting. Reusable: These food grade silicone pieces are available for dishwasher, refrigerator and microwave They can be reused. Sealing and Sealing: Sealing and sealing gaskets are made on most common mouth Mason vats to prevent fermentation and leaking from the vat. Money Savings: Replacement gaskets for these lids are hard to find - don't put on new lids, just buy a new set of gaskets and you'll never run out. Use: The Reusable food grade silicone rubber sealing ring is ideal for refrigerator and freezer storage, food warehouse storage, leak-free transportation of food or beverages, homemade fermentation lids, etc. . Packing List: 20 silicone sealing rings We only sell silicone sealing rings, not other products in the picture Due to differences between displays, the pictures may not reflect the actual color of the item. Minor dimensional errors are allowed due to manual measurement.