Raise or lower up to 35 lb. from 5 to 20 for ergonomic work position for people of all heights. Retractable, ergonomic keyboard tray to keep arms and wrists in comfortable positions. Grommet mounting system for installing a monitor arms for 1 or 2 monitors or hassle-free cable management. Will hold up to 2 monitors and a laptop. 40-1/2 x 27-1/8 x 9-1/2 in. Sold by each.