Ergotron 33-407-085 WorkFit-SR Dual Sit-Stand Workstation, Black This model is optimized to accommodate two displays up to 24" in size Work surface/keyboard tray stays on top of the desktop, never intruding into your space Configuration flexibility makes Work Fit-SR well suited to taller users Spacious work surface accommodates any keyboard and moussing device with plenty of room for other desktop items Worksurface Dimensions- 29.5 x 21.8 inches. LCD and keyboard adjust 18 inch in tandem. LCD adjusts 5 inch independently. Maximum LCD height adjustment - 23 inch