Designer Suites Monitor Riser features three height adjustments to prevent neck and shoulder strain. Raises monitor to comfortable viewing height while maximizing work space. Supports monitors up to 21" and 40 lb. and offers height adjustments up to 1-1/2" (between 4-1/4" and 5-3/4") for optimal viewing angle. Storage tray organizes essentials, such as pens and paper clips. Nonskid rubber feet protect work surface from scratches or scuffs.