This pack includes a model of a 24' Ore Hopper. It comes in the colors of four midwestern ore hauling railroads: Great Northern (three liveries), Northern Pacific, Milwaukee Road, and Burlington Northern.
The cars have an ore load cargo object that can be (un-) loaded either in the scenario editor by ticking the 'cargo' checkbox in the consist options, or in-game by using the coal (or other bulk freight) transfer objects.