Tabletop with a premium knife edge is the worksurface portion of Lorell Electric Height-Adjustable Workstations. It fits on Lorell Quadro Sit/Stand bases with button controller and other electric adjustable-height bases for a more versatile way of working so you can alternate between sitting and standing. Bases sold separately. 5-year limited warranty. 60 x 24 in. Charcoal.