Writable Book Tabs Labels for reading tab are writable and equipped with a specially designed ruler, which can be fixed on the loose-leaf notebook to prevent loss. Only half of the back of the label has strong adhesiveness, sticking firmly, but will not leave any glue when it is torn off. Package ContentsThe package includes 3 pack rectangle notes flags with a ruler, each pack of 10 different color tabs, totally of 200 pieces per pack. The muted and pretty colors will make your coding work more relax and provide big fun! Safe MaterialThe index file sticker is made of high-quality PET material and special adhesive, which is safe, durable, with smooth writing, which can be written on by ballpoint pens, pencils or markers. FunctionHelp you plan, organize, prioritize and personalize work, improve work efficiency, such as studying for exams, reading books, filling documents and looking for schedule. Wide ApplicationsThe index book markers are great to help you plan, organize, prioritize and personalize work, perfect for mark, tab, highlight textbooks, documents, or planners, which are ideal for home, school, or office use.