a merchandising system for display of items for sale . the merchandising system constitutes display units each comprising a rectangular base assembly and an upright frame assembly mounted thereon along the long axis thereof . the base assembly comprises a pair of end members joined together by a pair of parallel spaced outer tubular members defining the base sides and by an interior tubular member intermediate the outer tubular members . the base assembly is provided with casters and a replaceable cover providing the base with a smooth upper surface . the frame assembly comprises at least a pair of upright frame members removably affixed to the base intermediate tubular member and joined at their upper ends by a horizontal frame member . the frame assembly is capable of supporting standard hardware and accessories such as bracket - supported shelving , horizontal hangbars , faceouts , waterfalls , and the like . the frame assembly is also capable of surrounding and supporting single panels or back - to - back panels such as solid panels , slotted panels , wire grid panels and slotwall panels . the slotted , wire grid and slotwall panels are capable of supporting standard hardware and accessories useable therewith . the frame assembly may be divided by an intermediate upright frame member . the horizontal frame member can be replaced by a table top and the upright frame members can support shelves to convert a display unit to a feature table .