Upgradable to carry additional display: No, Material: Steel, Color Options: Black, Warranty: 10 years, Desk fixing options: Bolt through and desk clamp, Maximum desk thickness allowed (inches): 1.5, Spring-assisted height adjustability: No, Rotation around pole: No. The Atdec Donut Poles offer superior display versatility. They come in three different lengths each including one QuickShift™ Donut to guarantee a customized display installation.