A:
Upon research the difference between the Staples item # 565298 & # 736637 I have found the following information:
For the Staples item 565298: There is a keyboard stopper to keep keyboard securely on tray & the dimensions are 2.31"H x 23.35"W x 11.63"D
For the Staples item 736637: This tray also tilt adjusts to 3, 6, or 9 degrees to suit personal preference & the mouse is able to also switches to right or left side; tray fits standard or ergonomic keyboards. The dimensions are: 3.125"H x 28.625"W x 14"D.
Answered on 4/12/2011 by Laura B from Staples