Superb Superb Regular Mouth Canning Lid is a stylish and playful outfit perfect for themed parties or special occasions. Designed with attention to detail, it offers a flattering fit and eye-catching appeal for confident expression. Features Bousel integrity, proprietary, food-safe material developed for a stronger seal, more sealing power prevents buckling, safe to use with high pressure canners. PopLok assurance - the distinctive "pop" feature provides an audible and visual assurance of seal integrity through site, sound, and touch. Quintek protection - five layers of interior and exterior corrosion protection surrounding a steel core. Recommend tightening with three fingers to ensure the correct tightness, do not over-tighten for a proper seal. More sealing power prevents buckling, safe to use with high pressure canners. 12 per Pack. Pack of 24. Specifications Mouth Type: Regular Mouth. Country of Origin: United States. Weight: 4.58 lbs.