Packing list: 100 mason jar lids. Dimensions: 7 cm in diameter. The lid is compatible with the regular mouth of most 7 cm mason jars, but not compatible with wide mouth mason jars or bottles. Good tightness: No leakage, tightly sealed. The mason jar lid is equipped with a silicone ring. The lid is suitable for storing food, grains, seasonings, and beverages. You don't need to worry about leakage contaminating the kitchen or other areas. The lid can be used to store leftovers, sauces, juices, dry goods, spices, and other small items. You can use a marker to label food-related information on the lid or write the date to help track food preparation and purchase times. Material: The regular mason jar lids are made of tinplate, with a layer of silicone ring inside, and can be reused multiple times. The lids are resistant to high and low temperatures, making them suitable for use in refrigerators, dishwashers, and microwave ovens. These lids can replace rusted metal lids. Anti-rust effect: The lids are rust-proof and corrosion-resistant. Can be placed in the refrigerator. Size: Standard mouth 70 mm. Material: Tinplate. Color: Silver. Package contents: 100 x Jar Split-Type Lids (band not included). Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm.