Package content: You will get 30 sets of regular mouth mason canning jar lids and bands, the adequate quantity to use, replace and sharing with your family or friends; Note: the mason canning jar is not included. Material and design: Made of metal, and light weight,The screws thread on the bottle mouth can increase the friction force of hands, which facilitates the opening of the bottle. Good sealing performance: our canning jar lids contain nice leak-proof and airtight effect, good for sealing your food and preventing leakage, maintain your food is a fresh and clean condition for a long time. so you don't need to worry about leaking problems that can contaminate the kitchen or other places after seal. Wide application: Suitable for sealing the mason canning jars that stored spices, sweets, , fruits, jams, soft drinks, tea or coffee, nails, screws and other small objects. Colour: silver Material: metal Size: 70mm Package Contents: 30 * rings 30 * lid pieces Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.