- Quantity and Compatibility : Each set includes 30 packs of mason jar lids, measuring 70mm (2.8 inches) in diameter and 16mm (0.6 inches) in height. These lids are designed specifically for standard mason jars and are not compatible with wide-mouth jars or other bottle types. - Durable Material and Smart Design : Crafted from high-quality stainless steel, these lids are both durable and lightweight. The built-in silicone seals ensure a secure fit, preventing leaks. The threaded edge increases friction, making it easier to open jars. - Reusability and Safety : Unlike plastic covers, these metal lids are designed for long-term use, reducing waste. They are free from BPA and other harmful plasticizers, ensuring safe storage for your food. - Superior Sealing Performance : The stainless steel construction offers excellent sealing properties, keeping your contents fresh and preventing any leakage that could lead to contamination in your kitchen. - Practical Use Cases : Ideal for preserving homemade jams, pickling vegetables, or storing dry goods, these lids are versatile for various applications. Perfect for canning enthusiasts and anyone looking to maintain the quality of their stored foods. These mason jar lids provide a reliable sealing solution while ensuring safety and durability.