Packing list: 100 mason jar lids. Dimensions: 7 cm in diameter. The lid is compatible with standard mouth 7 cm mason jars, but not compatible with wide mouth mason jars or bottles. Good seal: No leakage, tightly sealed. The mason jar lid is equipped with a silicone ring. Suitable for storing food, grains, seasonings, and beverages. Helps prevent spills that could contaminate kitchen surfaces or other areas. Ideal for storing leftovers, sauces, juices, dry goods, spices, and small items. Can use a marker to label food information or write dates on the lid to track food storage time. Material: Tinplate with an inner silicone ring. Reusable and resistant to high and low temperatures. Suitable for use in refrigerators, dishwashers, and microwave ovens. Provides rust-resistant and corrosion-resistant performance. Size: Standard mouth 70 mm. Color: Silver. Package contents: 100 x Jar Split-Type Lids (band not included). Only the listed items are included; other products are not part of this package. Note: Lighting and display differences may cause slight variation in color between the image and the actual item. Measurement tolerance: +/- 1-3 cm.