The InterMountain HO 46011-24 Great Northern Green Empire Builder 12 Panel 40’ Box Car #20421 EX/OB is a ready-to-go pre-built model of a Great Northern 12-Panel 40' Boxcar in green color. Made of plastic and steel, this scale 1:87 replica features a two-rail system and is part of the transportation theme. With a corporate roadname of Great Northern, this model is a detailed and high-quality addition to any model railroad collection.