Designed to fit all of our A+ chairs. Larger standard work surface with pedestal leg design. MODEL HEIGHT DESK 9406 - With Bookbox 24''-33'' Adj 20'' x 26'' 94B6 - With Wire Bookbox 24''-33'' Adj 20'' x 26'' 94X6 - With No Bookbox 24''-33'' Adj 20'' x 26''OPTIONSPermaTuff EdgePlywood Core Work SurfaceSolid Plastic Work SurfaceNon-Skid GlidesQ-Ball GlidesBlack Edge