DURABLE IRON: Our curtain ring is made of high-quality iron material, which is durable, sturdy, and has a smooth surface, ensuring its long service life. QUANTITY AND SIZE : A package contains 50 metal curtain rings, with an inner diameter of 30mm that is suitable for most curtain rods, and a wire diameter of 3mm that is sturdy and durable. CONVENIENT INSTALLATION: The 30mm metal curtain rings also has a small hole with a diameter of 5mm, making it easy for you to wire and thread the curtains, making installation simple and fast. MULTIPLE USES: The silver curtain rings can be used for curtains in living rooms, shower curtains in bathrooms, curtains in rooms, etc., or not only for curtains, but also for hanging decorations, achieving multiple purposes.