With these clean white 12-part Mylar-reinforced index dividers, you can start to get a handle on all those odd papers that get left lying around. Each divider is made from sturdy manilla, and the matching white tabs are Mylar-coated for long-lasting durability and pre-printed 1-12 - great for tidy filing by month. They're multi-punched to fit almost any A4 ring binder or lever arch file.