updowndesks OVERTURE Standing Desk Base &ndash; Programmable Adjustable Height Computer Desk (Base Only) &ndash; Silver Programmable positioning control for both sitting & standing height. Height range 25.92"- 42.45 (incl. 1" work surface - sold separately) Heavy Duty - lifts 268 pounds. Base width is expandable from 25.6" to 66". Stability without crossbars means pure, simple design.