Translucent and Waterproof: The index tag is made of PET, which is translucent and waterproof. The transparent design meets the need for note-taking and helps you easily annotate on the page without obscuring important information. Writable and Repositionable: They have a smooth surface and are easy to remove and reposition, you can write and mark with a ballpoint pen or pencil without damaging the book. Color Labels: There are 40 colors in total, each with 10 different colors. You can use it to highlight important information, and the different colored labels make it easy to find. VERSATILE USE: This tape flag is suitable for school or office and is also the perfect gift. Ideal for marking up and highlighting reading notes, books, folders, directories and documents.