The MTH Premier Union Pacific Big Boy Steam Locomotive #4012 MT 3021LP is a highly detailed replica of a Union Pacific Railroad steam locomotive. This model features a 4-8-8-4 wheel configuration, diecast construction, and a scale of 1:48. It also includes light and sound functions, as well as a tender car. With its black color scheme and intricate design, this locomotive is a must-have for collectors and model railroad enthusiasts.