Prodigy combination desk. MODEL SHAPE HEIGHT DESK P458 A+ 18.5'' 20''x26'' P457 A 17.5'' 20''x26'' P408 -NBRK A+ 18.5'' 20''x26'' P407- NBRK A 17.5'' 20''x26''OPTIONSPermaTuff EdgePlywood Core Work SurfaceSolid Plastic Work SurfaceBlack EdgeNon-Skid GlidesQ-Ball GlidesThree Work Surface Shape Options: Rectangle, Soft-Rectangle and TeamingSteel Glides