Ring Dimension--Wire Diameter: 4mm; Inner Diameter: 38mm/1.49 inch; Out Diameter: 46mm/1.81 inch (Fit for rod dia. 25-28mm)Electroplating Treatment: This curtain ring is processed by electroplating technology. It has better corrosion resistance and wear resistance than common metal. You don't have to worry about rust when hanging it in the bathroom.Durable Solid Metal: All of our curtain rings are made of solid metal with high polished surface to ensure they can slide smoothly on the rod. Solid metal rings provide longer service life and it will not break easily.Easy Installation: It is very easy to install and disassemble. Slide the rings to your rod, caught your curtain, drapery with clips. The curtain rings can be widely applied for most kinds of curtains, such as shower curtain, window curtain, french window curtain and so on.