3M-PLATFORM,TRAY W/CLAMP,BK. Tool-Free Install Keyboard Tray, 25-1/2 x 11-1/2, Black. All-in-one design accommodates both keyboard and mouse with a mousing surface that can be positioned on the left or right. Gel wrist rest with antimicrobial product protection inhibits the growth of microorganisms, such as bacteria, that can cause stains,. 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): +1"/-4 1/2".