Vivid color: you get 400 pieces binding discs in bright colors, meet your multiple needs and help you do document classification; At the same time, bright colors can attract children's or students' attention and make them happy to DIY their own projects material: these discbound expansion discs are made of quality plastic, , safe, non- and not easy to break, easy to store, apply or carry out for a business trip, the is smooth to that the page does not get stuck when turning Practical to use: plastic binding rings can be arranged flexibly, easy and convenient to to add, remove and replace notebook pages, without damaging the paper, very suitable for students, office workers, travelers, designer, etc. Easy to apply: suitable for arrange your papers, documents, notebook pages, paintings, keep them organized and look more neat and clear Widely application: these plastic discs can be applied for A7, A6, A5, A4, B5 papers of sizes, and suitable for loose-leaf, memo filing, scrapbook, great for fastening pretty document stack, index, curriculum cards, notebook, papers and keys, make them organized and not messy, great for office and home Color: white+yellow+blue+pink+ material: plastic Package Contents: 400 Pieces Plastic Book 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.