Supports up to 36kg or 21 inch CRT or TFT/LCD monitor, height adjustable with five positions 64mm - 165mm, durable plastic base doubles as paper storage shelf, platinum. Fellowes Premium Monitor Riser is an adjustable monitor riser with five height positions in order to promote comfortable working conditions and prevent neck strain associated with extended computer use. The risers innovative stacking columns ensure maximum viewing comfort while in use and makes the unit capable of holding up to 60lbs the ideal support for many monitors. There is space on the lower shelf of the unit for storing paper supplies in order to keep your desk tidy and keep stationary on hand.