Carpet friendly, dual entry combination desk. MODEL SHAPE HEIGHT DESK 7858 A+ 18.5'' 18''x24'' 7857 A 17.5'' 18''x24'' 7808 - NBRK A+ 18.5'' 18''x24'' 7807 - NBRK A 17.5'' 18''x24''OPTIONSPerma-Tuff EdgePlywood Core Work SurfaceSolid Plastic Work SurfaceSeat + back padsBlack EdgeNon-Skid GlidesQ-Ball Glides