Safe and rust-proof material: these jar lids are made of plastic, safe, non-toxic and rust-proof to use, not easy to break or rust like ordinary metal lids, can serve you for a lasting timeConvenient to operate: our plastic jar lids are easy to twist on and unscrew, they are suitable for dishwasher cleaning, convenient to operate and wash, no need to take too much effortsSealing feature: our canning jar lids are designed with integrated silicone gasket, which contains nicely airtight, watertight and leak-proof function, easy for you to store dry goods or drinks, such as beans, cookie, candy, jam, oil, honey, and moreWide usages: our wide mouth and regular mouth storage caps are compatible with most wide or regular mouth mason jar and canning jar, can help to freeze or store your delicious foodsOur white storage caps are thoughtful accessories for you to use at home, kitchen, restaurant, coffee shops, bar indoor cooking, outdoor barbecue and so on, bring much convenience to your life.These canning jar lids contain integrated silicone gasket, which contains nicely airtight, watertight and leak-proof function and can form a a sealed space for storing dry goods or drinks, such as beans, cookie, candy, jam, oil, honey, and more.colour:whitematerial:plasticPackage Contents:10 * Wide mouth cover (86mm)10 * Ordinary mouth (70mm)Only the above package content, other products are not included.Note: Light shooting 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.