Technical Specifications‎:‎ Material‎:‎ Plastic Color‎:‎ Black Outer Diameter‎:‎ 55mm‎(‎2.16‎"‎‎)‎ Innner Diameter‎:‎ 38mm‎(‎1.49‎"‎‎)‎ Features and Benefits‎:‎ ● Incorporates small ring to attatch curtain hook ● Suitable for most weights of curtains‎.‎ ● To fit up to 38mm Diameter poles Notice‎:‎ 1‎.‎ Please allow 1‎-3mm error due to manual measurement‎.‎Pls make sure you do not mind before you bid‎.‎ 2‎.‎ The color may have different as the difference display‎,‎pls understand‎.‎ Package Contents‎:‎ 12 x Curtain Rings