Durable Office Products DBL551500 Display System 10- Panel Letter Desk- Wall Mount Asst. Panels Store portrait and landscape sheets in one reference system. 10-panel letter-size reference system displays 20 sheets and effortlessly adjusts from portrait to landscape format with the touch of a hand. Panel holder rotates for either view. Dual function design permits unit to be used either as a desk system or mounted to a wall. Glare-free polypropylene panels have rugged outer frames in assorted colors (two each of black, blue, green, red and yellow). Plastic display system includes 10 snap-on tabs that can be top-mounted or side-mounted.