- COMPATIBLE WITH REGULAR MOUTH LIDS: This set includes 10 reusable platinum silicone seals designed to fit regular mouth mason jars with a 2.38-inch internal diameter. Each seal measures 70mm (2.75 inches) outside diameter, 50mm (2 inches) inside diameter, and 2.6mm (0.1 inches) thick. - PREMIUM QUALITY: Enjoy leak-proof, airtight performance with these durable silicone seals. Designed to work with Ball plastic storage caps, stainless steel storage lids, and various other lids, our seals feature a thicker design with a secure groove that ensures a snug fit, with the groove positioned upward toward the top of the lid. - SAFE AND ECO-FRIENDLY: Made from BPA-free, platinum-cured silicone rubber, these seals are dishwasher, freezer, and microwave safe. Platinum silicone is a non-toxic, environmentally friendly material that does not leach chemicals, providing a safer option for food storage. - VERSATILE APPLICATIONS: Ideal for fridge and freezer storage, pantry organization, and transporting food or beverages without leaks. They are also suitable for homemade fermenting lids. For optimal performance, use these seals with threaded closure jars. Note that they may not provide an airtight seal with wire bail or clamp closure jars and are not intended for canning. - EXPERIENCE THE DIFFERENCE: Upgrade your food storage solutions with these reliable silicone seals that outlast the competition. Perfect for anyone looking to enhance their kitchen efficiency while ensuring safe and secure storage.