Revolutionary design with a structural polypropylene box. Mix or match colors with the Discover chair. Standard .5'' concave edge for comfort with style (on laminate surface only). MODEL HEIGHT DESK DAOD 22''-30'' Adj 18''x24'' DHOD-29 29'' Fixed 18''x24'' DHOD-27 27'' Fixed 18''x24'' DHOD-25 25'' Fixed 18''x24'' DHOD-23 23'' Fixed 18''x24''OPTIONSPermaTuff EdgePlywood Core Work SurfaceSolid Plastic Work SurfaceBlack EdgeNon-Skid GlidesQ-Ball GlidesSteel Glides