40 Pack metal curtain rings hanging rings for curtains and rods, 30 mm internal diameter Heavy duty curtain ring:Make full use of the heavy duty metal and strict design, the bearing is good, and will not deform or drop out suddenly. Durable and won't rust:The silver metal curtain ring are made of durable metal, nonporous surface and therefore will last for years without rusting. Eliminate scratch:Nice polished and smooth surface without burrs to your curtain, eliminate snagging, tugging and pulling of the curtain. Widely apply:The curtain rings are in silver, wide applied for most kinds of curtains, such as shower curtain, window curtain, french window curtain and so on. colour:Silver Material:metal Size: Outside diameter: 40mm Inside diameter: 32mm Package Contents: 40 x Curtain rings Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.