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. Standard—11" arm for use with straight workstations. Color: Black; Workstation Type: Straight; Height (+\/- Desktop): +0"\/-6"; Keyboard Tray Dimensions (W x D): 21.25" x 10" or 30.5" x 10".