High Quality Material: The self-adhesive labels are made of high quality PET material. Tear-resistant and writes smoothly, you can write with pens, pencils, gel pens or permanent markers. Plenty of Quantity: You will receive 240 (20 sheets) colorful write-on labels. The quantity is enough to meet your daily needs. EASY TO USE: The index tabs have preset folding positions and are self-adhesive, just peel off the tabs and stick them to the desired surface for easy folding. 12 Colors: Stickers come in 12 colors, our label colors are non-irritating to the eyes and more comfortable to use than fluorescent colors. Wide Application: You can use different colors to distinguish themes. These adhesive strip markers are great for study notes, reading books, document marking, notes.