Material: The curtain rings are made of sturdy metal, which can bear the weight of curtains. 60 pieces per pack, enough for daily use and as replacements. Size: The inner diameter of these metal curtain rings is 38 mm. Make sure you choose the right size when purchasing. Excellent design: Our curtain rings are chrome-plated and polished, with a smooth surface and no burrs, so they won't snag, snag, pull, or tear on curtains. Wide application: The curtain rings are black and are widely used for most types of curtains, such as drapes, duvet covers, shower curtains, and door curtains. Easy to install: The curtain rings pass individually through the curtain rod. Insert the curtain hook into the small ring, then you can easily try to move the curtains.