Design: The curtain rings large ring for curtain rod, the small ring for curtain clipInstallation: Curtain ring go through the curtain rod one by one, and curtain hooks into the small ring, then sliding the curtain easilyApplication: Widely applied for most kinds of curtains in various colors, heavy curtains or lightweight curtainsMake full use of the heavy duty metal and strict design, bearing good, and never deformation or drop out suddenly.Nice polished and smooth surface without burrs to catch on your curtain, eliminate snagging, tugging and pulling of the curtain.Internal diameter: 38 mm, fit for 33 mm curtain rodsOutside diameter: Approx. 45 mmSize of the rings: line width about 4 mmSmall ring internal diameter: 6 mmColor: BlackMaterial: Iron Package Contents: 40 * Curtain Rings