3M-PLATFORM,KYBDW/ARM,ADJ,BK. Positive Locking Keyboard Tray, 25-1/2 x 11-1/2, Black. Long extension arm accomodates corner workstations while low-profile platform provides extra leg space. All-in-one platform design holds both keyboard and mouse. Star knob control for easy height, +/-15° tilt and 360° swivel adjustability. Full-length leatherette gel wrist rest with Precise™ optical mousing surface. Holds standard and ergonomic keyboards. Workstation Type—Diagonal, curved or straight Glide Track Length—21". Color(s): Black; Keyboard Tray Dimensions (W x D): 25 1/5" x 12"; Mouse Tray Dimensions (W x D): 9 1/2" x 8"; Height (+/- Desktop): +5"/-5.5".