[Features] Can be connected vertically and horizontally. (Vertical connection is only possible with casters that are all flexible (including those with stoppers).) Stackable. The cargo bed has a robust rib structure. It is resistant to chemicals and solvents and has excellent durability. There are 4 non-slip rubbers on the table. Corner stoppers for ROUTE VAN MP-600 can be installed. (600 series) The use of elastomer resin wheels reduces tire marks. An optional fence can be attached to prevent cargo from collapsing. (When loading lightweight objects)