Packing list: 100 jar lids. Dimensions: 2.75 inches/7 cm in diameter. The lid of the jar can be compatible with the regular mouth of most 7 cm jars, but not compatible with other wide mouth jars or bottles. [Good tightness]: No leakage, tightly sealed. The lid of the jar is equipped with a silicone ring. The canned lid is suitable for keeping food, grains, seasonings, and beverages fresh. You don't need to worry about the leakage of sealing material contaminating the kitchen or other places. The lid can be used to store leftovers, fresh sauces or juices, dry goods storage, spices and other small items. In addition, you can use a marker to mark food-related information on the lid of the jar, or write the date on the lid, which can help you record the time of food production and purchase. [Material]The Regular Jar Lids are made of tinplate, and there is a layer of silicone ring inside and can be reused many times.canning lids are resistant to high and low temperatures, so canning lids