Index Tabs with Ruler: You will receive 3 pack rectangle notes flags with ruler, 600 pieces index tabs in total with rich colors, can meet your all demands. Colored Sticky Notes:The index tabs is specially designed for color coding and make sure you swim easily through a sea of data, organize your work and make specific pages easier to find with. Writable Book Tabs:The index tabs stickers are writable, and with specially designed ruler which can be fixed on loose-leaf notebook to prevent loss and for emergency measuring if needed. Wide Applications: It can help you plan, organize, prioritize and personalize work, such as studying for exams, reading books, filling documents and looking for schedule. It can be used for indexing, marking, etc. without obstructing the text. Healthy Material:Made of hight-quality PET material and special adhesive, the sticky note is waterproof, non-toxic, and no odor. The removable adhesive makes it easy for repositioning, you can take them off without ripping the paper or page.