[Curtain Ring Set Accessories]: The set includes 20 black metal curtain rings and 20 white plastic curtain hooks, they can be used together, enough for daily use and replacement. [Suitable Size]: Inside diameter of the hanging ring is 30 mm/ 1.2" fit for less than 27 mm/ 1.1" inch curtain rods, and curtain hook measures 27mm/1.2" in length. Please make sure the size when you buy it. [Sturdy Curtain Ring]: Curtain ring are nice polished and surface without burrs, not easy to deform, and black heavy duty metal curtain rings for your curtains. [Easy to Install]: Curtain rings go through the curtain rod one by one, and curtain hooks into the white plastic curtain hooks, then you can try to sliding the curtain easily. [Perfect Curtain Necessaries]: The curtain glider hoops and pole rings allows for easy hanging of bed curtains, using them for a closet door with sheets, shower curtain, window curtain, french window curtain and so on.