These metal curtains rings are made of strong steel material and have a 1.5" inner diameter , suitable for 1.2" and below diameter curtains rods. The outer surface has a black Baking varnish treatment that ensures a smooth and bright finish, and is rust-resistant and corrosion-resistant. Each package contains 18 curtains rings, enough for large curtains. Easy to install and remove, they are convenient for cleaning and maintenance. These high-quality curtains rings provide sturdy and reliable support for curtains, ensuring a smooth and stable hanging effect.