Regular and Wide Mouth Lids available for canning, preserving and pickling. Create an airtight seal to keep food preseerved.Specifications and Features: Canning Equipment Type: Canning Jar Lids Features: Dishwasher Safe Jar Mouth Size: Wide Package Quantity: 12 Primary Color: Gray Primary Material: Metal Product Height: 6.00 in. Product Length: 3.50 in. Product Weight: 0.60 lb. Product Width: 3.75 in.