MATERIAL: not easy to rust and has strong tension. The is plated golden and polished without any rough edges. Size: 38mm in diameter,It's applicable to the general market of curtain rod. ADVANTAGE: The curtain ring can be opened and closed, it has great locking mechanism and construction, it 't break easily and open up by themselves after using a long time. Installment: Hang the curtain rings one by one on the curtain rod, then you can put a hook or clamp on the small ring, and finally put the curtain on, you can slide the curtain easily. WIDE APPLICATION: This curtain ring is applicable to a wide range of areas. The appearance is applicable to the decoration of the living room curtain and door curtain , as well as the hanging of the shower curtain in the bathroom. Name: With a small ring split ring Noodle product features: a small circle is welded on the opening card ring, which is convenient for use with non-movable poles, flexible and convenient colour: silver Material: iron Package Contents: 40 * Curtain ring hanging ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.