Unmatched DurabilityCounterbalanced stackers can be found working on loading docks, in stock rooms and on manufacturing floors, where durability and dependability are crucial. The WB Series is built to keep pace in these tough, fast-paced environments. The Crown-built drive unit is built to withstand the constant starts, stops, direction changes and impacts encountered when crossing dock levelers, expansion joints and rough floors. The frame features generous amounts of heavy-gauge steel with added structural supports at high stress points. Steel power unit doors provide increased protection to internal components.