SUPERIOR SEAL: Each canning lid features a food-grade silicone sealing ring that ensures an airtight, leak-proof seal, perfect for preserving the freshness and flavor of your homemade jams, jellies, pickles, and more. DURABLE & EASY TO USE: Made from premium tinplate steel, not easy to rust or bend. Smooth edges and uniform design make these lids easy to handle and apply. The raised center allows for a quick check of the seal status, providing peace of mind for all your canning needs. BULK VALUE PACK: Sold in a convenient set of 100, these mason jar lids offer excellent value, meeting various usage scenarios, keeping your pantry stocked, and saving you time and money on frequent purchases. UNIVERSAL FIT: Designed to fit all standard mason jars, versatile for any canning project. Whether you're using Ball or other brands, these lids will fit securely. DIY-FRIENDLY DESIGN: These mason jar lids have a writable surface, allowing you to note the canning date and food information directly on the lid. This practical feature helps you track freshness and storage duration, making pantry management easier and reducing waste. COLOR: As shown in the picture.