Using tab dividers in your notebook helps you quickly spot the content you are looking for. The vividly colored dividers are made of durable polypropylene and work with your existing Custom Note-Taking System for professional organization. Compatible with the TUL Custom Note-Taking System (sold separately). Helps you find the section of your notes that you need. Made of strong polypropylene to stand up to constant use. Bright colors are easy to identify in your file cabinet.