Positive Locking Keyboard Tray Standard Platform 21-3/4" Track Black All-in-one keyboard platform with 6" height range 360° swivel and +10°/-15° tilt. Lever handle ensures positive lock on platform height; just flip lever to the right adjust height and move lever back to lock in place. Separate pull lever for tilt adjustment. Mousing surface can be positioned right or left. Full-width leatherette gel wrist rest with antimicrobial product protection. Precise⠢ mousing surface extends battery life. Color: Black; Workstation Type: 90° Corner; Curved; Diagonal; Straight; Height (+/- Desktop): +.5"/-5.5"; Keyboard Tray Dimensions (W x D): 25 1/2" x 12".