Dimensions - Internal Diameter 35 Mm. Outer Diameter: 42 Mm / 1.7 Inch. Suitable For Metal Rods With A Diameter Of Less Than 2.5.Material Properties - The Surface Of The High Quality Metal Curtain Ring Is Electroplated For Long Lasting Rust Protection. Easy To Use And Won'T Damage Your Curtain. Design Benefits - Metal Curtain Rings Have Beautifully Polished Surface Without Burrs, You Can Pull The Curtain Freely And Fluently. With You Can Remove The Ring From The Curtain And Use The Clip Alone.Easy To Use - Lightweight Gold Curtain Rings Easy To Install And Disassemble, Tighten The Curtain With Your Clip, Then Just Slide The Round Curtain Rings On Your Rod And Secure The Curtains.Application Scenario - Metal Curtain Clip Rings Are Perfect For Hotels, Restaurants, Cafes, Bars, Meeting Rooms, Bedrooms, Bathrooms, Etc.