The MTH 20-3117-1 is a model of the Pennsylvania 2-10-0 steam locomotive and tender, numbered 4311, equipped with Proto-Sound 2.0 (PS2) technology. This model replicates the design and features of the early 20th-century steam locomotives used by the Pennsylvania Railroad, known for their heavy freight capabilities, featuring a 2-10-0 wheel arrangement that provided significant traction for hauling loads over the mountainous terrain common in the railroad's operational area.