Stock up on Quality Canning Jar Lids and Bands Engineered to be the highest quality lids available, these canning lids have a specially formulated adhesive that is thicker and wider to seal on virtually all jars (always follow USDA recommendations when canning). Made in America - USA made in Ohio Pack of 12 lids with bands. BluSeal Integrity - More sealing power and designed to prevent buckling. Safe for high pressure canning.. QuinTek Protection - Five layers of corrosion protection. "Pop" Lok Assurance - Distinctive "popping" sound ensures seal. More vacuum, longer-lasting seal.. Made in America - USA made in Ohio . Pack of 12. Helpful Hint: When tightening the ring prior to canning, it is important to tighten it, but not make it too tight because over-tightening the ring will not allow the jar to seal properly.An easy way to ensure that the ring is the right tightness - use the three-finger method. Using only three fingers prevents you from over-tightening.