?DIMENSIONS? Outer diameter: 48mm; inner diameter: 38mm; Thickness: 4 mm. ?MATERIALS? durable, rust-proof, rust-proof metal compound (iron, copper, stainless steel) QUANTITY OF CURTAIN CLIPS? Set of 20 pieces, including removable eyelets and clips. Large clip rings for hanging curtains on a curtain rod. ?ADDITIONAL HARDNESS? Strong tension clip for stronger applications, extra thickness and hardness, durable design, stronger tension clip holds heavier curtains without problem. ?WIDE APPLICATIONS? These curtain accessories are suitable for most types of curtains such as shower curtains, window curtains, French curtains and more. Description These curtain clip rings slide easily onto any metal rod up to 1, 38"" (35mm) diameter. With a high tension clip you can easily hang a particularly heavy curtain. & Nbsp; To hang curtains with pleated needle hooks, simply remove the clip and pull the hook through the eyelet. & nbsp; The inner diameter is 38 mm. Please make sure the size is correct