MATERIAL: Made of sound metal, not easy to rust and has strong tension. The surface is plated golden and polished without any rough edges.SIZE: Thickness 0.3 cm / 0.12 inch; Inner Diameter 3.8 cm / 1.5 inch; Small Ring Inner Diameter 0.8 cm / 0.3 inch. The maximum opening of the product is 7cm/ 2.76 inch. It\u2019s 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 won\u2019t 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 golden appearance is applicable to the decoration of the living room curtain and door curtain at home, as well as the hanging of the shower curtain in the bathroom.