Suitability - Each mason canning jar lid size is approx 70 mm/ 2.7 inches in diameter, suitable for jars in 60 mm inner diameter and 70 mm outer diameter (or 8 oz to 16 oz regular mouth mason canning jar) Notice:contains only the lid and does not contain the jar. Reliable material - These mason canning jars are made of stainless steel material, reusable and rust-proof, leakproof and durable, safe material for your use and dishwasher safe, can last for a long time, fine workmanship ensures smooth surface and nice textures. Strong sealing performance - Our canning jar lids contain silicone ring makes the mason canning jar lids have good sealing performance, air tight and leak free, airtight effect ensures. No need to worry about leakage that may contaminate the kitchen or other places after sealing materials. Utility - Fit for toddlers (less spills), kids and adults as the straws are a proper length for 8 oz to 16 oz regular mouth Mason jars, suitable size for those thicker shakes but not too wide for little mouths. Widely usages -The ball canning lids are suitable for storage bottle, water bottle, liquid bottle and more jars, ideal for you to make craft projects, diy candles, soap pumps, torches and more. Features: Fit for toddlers (less spills), kids and adults as the straws are a proper length for 8 oz to 16 oz regular mouth Kerr jars, suitable size for those thicker shakes but not too wide for little mouths. Extensive usage: Canning jar lids is suitable for parties, craft projects, diy candles, to make soap pumps, torches and much more, the lid is compatible with ball and Kerr wide Mason jar, a friction zone is designed to ensure non-slippery. Specification: Color: silver Material: stainless steel Size: 70 mm/2.7 inch in diameter, 15 mm in depth Package includes: 6 x Mason jar lids with straw hole