Adjustable keyboard platform feature unique modular platforms that adjust for different sized keyboarding surfaces. Use all three platforms or just one. Includes wrist rest for keyboard. Utilizes easy color-coded window for instant color adjustments. Standard11" arm for use with straight workstations. Workstation Type: Straight; Sit-to-Stand Option: No; Height (+/- Desktop): +0" Above to -6" Below; Keyboard Tray Dimensions (W x D): 21.25" x 10" or 30.5" x 10".