C-Line 13-Pocket Letter Size Ladder Expanding File, Blue (48015) Ladder Expanding File features unique tiered design that allows for easier access to important papers and documents Features extra durable, rigid poly construction and attractive exterior finish Includes elastic string and double button closure that allows security flap to stay in place when in both the open or closed positions 13 pockets expand to hold important materials Cut-outs on front and back make for easy transport