Kensington Smartfit Sit Stand WorkstationDescriptionSpecificationsShipping Height adjustable monitor mount to achieve ergonomic arm position Height adjustable keyboard tray to achieve ergonomic arm position Extra work surface saves space and moves with the workstation Four pivot points allow for full articulation of arm Cable management channel for a clean look and uncluttered space Reinforced clamp and base securely attaches to desks 3 4 2 1 2 inches thick Matic lift smoothly transitions