Single knob adjusts tray height and tilt up to +0/-10. Swivels left or right and swings back underneath work surface for storage. Sliding arm lets you pull keyboard closer. Mouse tray can be mounted on left- or right-hand side. Constructed of solid 2mm thick steel for lasting performance. Memory foam wrist rests. Color: Black/Silver; Workstation Type: Curved; Diagonal; Straight; Height (+/- Desktop): +1 1/8"/-4 3/4"; Keyboard Tray Dimensions (W x D): 21 1/4" x 10".