Equipped with 20 plastic expansion disks (purple, blue, yellow, pink, white, transparent, black), 7 colors can meet your needs in work, school, or , and help you classify files. These expansion CDs can be flexibly applied, easily and conveniently adding, deleting, and replacing notebook pages without damaging the paper, making them suitable for CDs for students, office workers, travelers, designers, and more. These expansion disks are made of high-quality plastic, light in weight, high in use, and not easily broken, making them convenient for use in business travel; A 2-inch disk size will increase your page capacity for laptops; In addition, due to its smooth surface, there will be no paper jam during pagination. These discs used for can be suitable for sizes of paper such as A7, A6, A5, A4, and B5; With these circular discs, you can easily classify and manage them, suitable for loose pages and , as well as fixing cute file stacks, indexes, card bags, photos, and more. Make them well organized and not messy. Circular plastic expander discs can be used as exquisite gifts for students, office workers, travelers, designers, and more. Different bright colors can attract students' attention and make them enjoy doing their own Colour:As Shown Material:Plastic Size:About 5.4cm long Package Contents: 20 * Loose leaf buckle 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.