The packaging includes: 50 book ring, 10 colors: orange, light pink, red, gray, purple, blue, yellow, rose red, green, light yellowSize: 1 -inch (30 mm) outer diameter, 1 -inch (25 mm) inner diameterThese paper rings are made of steel, and then coated with metal colors, which are easy to classify and organize colorsThese books can accommodate samples, keys, files, memo, ID cards, flash drives, etc. to that they will not be lost. In addition, their stylish and modern design complements any style, suitable for individuals or professional useOur pack 50 metal keychain provides sufficient supply for uses. Strong metal materials durability, so that you can reuse it Color: mixed color material: metal Package Contents: 50 x Binder Rings Only the above package content, other products are not included. Note: Light reflection 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.