The adjustable keyboard tray by ESI has a 25" wide platform that can accommodate a keyboard and mouse for left or right hand users. The articulating arm is on a 21" glide track and it also has a lift-and-lock height adjustment that can be positioned 2.5" above or 4.5" below the track. It comes with a 15 year warranty on the platform and a 2 year warranty on the palm rest.