Clear at a glance: The hardcover is translucent for easy viewing. Size: 570*425mm^ Unique design: rounded corner design to prevent scratches. The adhesive is made of acid-free archive quality polyethylene. ^ Powerful built-in spring clip: securely hold up to 100 sheets of letter-size paper. Use folders with clips to organize loose-leaf files without holes; as a folder with a protective cover^ Filing becomes easy: non-porous alligator clips provide storage, easy removal and access to receipts, contracts, forms, lists, recipes, resumes, documents or any documents you dont want to punch. ^ A wide range of usage scenarios: suitable for schools, offices, travel and families. As a binder for adults and children, our notebook binder is suitable for your daily bags, backpacks and suitcases.