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 tightness]: 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 other small items. Can use a marker to label food information or write dates on the lid to track food preparation or purchase times. [Material]: Made of tinplate with a silicone sealing ring inside. Reusable and resistant to high and low temperatures. Suitable for use in refrigerators, dishwashers, and microwave ovens. Can be used to replace rusted metal lids. [Anti-rust effect]: Rust-proof and corrosion-resistant. Can be stored 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: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.