1.The sticky book tabs ser have 4 set notes flags with ruler, with different colors. 2.Sticky tabs made of PET material, waterproof and no odor. It is writable and smooth writing, you can use it to write or marked. 3.Colorful sticky page tabs, use tabs to mark and highlight the important information, different colored index tabs are eye-catching for you easy to find.Save your time, improve your work and study efficiency. 4.These index tabs can be used for office file filing, note-taking tool for students and daily life memo annotation tabs, these sticky note tabs recommended to write with a ballpoint pen or pencil. 5.Beautiful and impressive sticky tabs will give more fun to your life, these book tabs will be a sweet gift, also will be welcomed with students, office workers, teachers, families, colleagues and so on.