Two-tone color reverses to double the number of available colors. Various bright colors make color-coding easy. Interior is a lighter shade than exterior making top tabs easier to see, preventing misfiling. 11 pt. stock. Acid-free. This product was made from wood sourced from a certified managed forest. File Folder Type: Top Tab; Size: Letter; Folder Material: 11 pt. Stock; Color(s): Green/Light Green.