IDEAL SIZE: Screw-on lids (fi43) fit 40ml jars and bottles with a 43mm thread diameter. This thread is common on mini jars and small bottles used for storing juice, jams, preserves, or honey. EASY TO CLEAN: Our screw-on lids are made of galvanized sheet metal and coated with silicone on the inside. This prevents the contents from reacting with the metal and protects the lid from moisture damage. FOOD-SAFE: The metal screw-on lids are suitable for sterilization and pasteurization. This ensures that neither the taste nor the quality of your preserves is affected. Do not wash with harsh sponges to avoid damaging the silicone coating. AIRTIGHT: The canning lids have four locking teeth and fit twist-off jars. These are reliable seals that significantly contribute to preserving the flavor of your preserves. They provide excellent protection for preserves against air and moisture. VERSATILE: Our lids for screw-top jars are available in six colors: gold, red, black, green, silver, and white.