Canning Lids Suitable for Regular Mouth Mason Jars, 100% Fit & Airtight for canning food, jams, fruits, biscuits etc. These regular mouth canned lids can bring a lot of convenience to your cooking process. We can use regular mouth mason jar lids to make all kinds of jams or cans as you like. Jar Lids Regular Mouth Set Specification: Color: Silver Material: Tinplate Metal Quantity: 180 pieces canning lids regular mouth Jar Lids Size: 2.67 inches / 70 mm, outer diameter About the mason jar lids use： 1.Split-Type Lids include regular mouth canning jar lids,let the canning lids and canning jars bands work together can reusable leak proof. 2.Heat the canning lids in hot water,heating softens the sealing compound.Put on our jar lids on the ring cap, please be careful not to tighten it too tightly, so as to better let the air out and ensure the tightness. 3.Heat the mason jar in a pot under cold water to boil 8 to 10 minutes.Vacuum pressure caused by the boiling water bath pulls the inner lid down and causes an airtight seal. Helping it form an airtight seal with the jar. 4.The canning ring is there to hold the inner lid in place until the vacuum seal takes effect.This ensures a tight, sanitary seal.And the thread design on the top of the canning rings canning increase the friction of the hand, making it easier for you to seal and open cans when making cans. 5.Jar bands are not needed on stored jars.They can be removed easily after mason jars are cooled. When removed, washed, dried, and stored in a dry area, jar bands may be can used many times. Notes: 1.Please make sure the regular mouth canning lids size before purchase. 2.Please keep the canning lid clean and dry to prevent rust, if there is water, wipe clean the mason jar lids with a dry cloth. 3.The edge of the jar lids is a little sharp, so be careful not to cut your fingers.