Easy assembly. This mobile computer workstation allows you to work comfortably standing up. Tubular steel frame is reinforced by 2 panels for added stability. Top platform and printer shelf adjust at 2 increments. Roll-out keyboard shelf adjusts 40 – 46 height. Mouse shelf stores away under the keyboard shelf. Bottom storage shelf is fixed. 4 non-marring casters 2 locking make for easy maneuverability. Top Platform: 25-1/2W x 22D. Roll-Out Keyboard Shelf: 21W x 16D. Printer Shelf: 25-1/2W x 17D. Mouse Shelf: 9W x 12D x 3/4H. Adjustable CPU Holder: 10-1/4W x 10-1/2D. Overall Dimensions: 25-1/2W x 22D x 44-1/2H.