PACKAGE CONTENT: You will get 20 sets regular mouth mason canning jar lids and bands, adequate quantity for you to use, replace and sharing with your family or friends; Note: the band is included. Size: this product is split-type lids, which includes bands and lids, the two parts can be separated or put together;the jar lids and bands are made of tinplate and the lid covers a ring that made of PVC, rust proof and durable, can be applied for many times use; High and low temperature resistant, so it can be served in refrigerators, dishwasher and microwave ovens Split Design:The band can be applied in combination with silicone fermenting lids and stainless steel sprouting lids, the screw thread on the bottle mouth can increase the friction force of hands, which facilitates the opening of the bottle. Good Sealing :The sealing ring inside the jar lid makes the mason canning jar lids have good sealing performance, air tight and leak free, tightly seal ensures it's suitable for keeping food, grains, dressings, drinks fresh, no need to worry about leakage that may contaminate the kitchen or other places after sealing materials. Suitable for sealing the mason canning jars that stored spices, sweets, biscuits, fruits, jams, soft drinks, tea or coffee, nails, screws and other small objects, please make sure the size before purchas