Smead Poly Hanging Expanding File, 12 Dividers, Retractable Hooks, Letter Size, Black (65125) It's an expanding file that fits in your file drawer, and has retractable hooks for convenient portability 12 indexed dividers provide 13 letter size pockets. Each pocket expands 7/8" Durable poly material is tear resistant and water proof Includes large colored tab inserts printed with alphabetical and monthly headings Includes 1 letter size hanging expanding file (11-7/8" x 9-1/4" exclusive of rods) with preprinted tab inserts Acid free and PVC free