The Rapido Trains 28542/28538 HO Scale Union Pacific EMD E8A+E8B are ready-to-go pre-built models of a Union Pacific Railroad diesel locomotive in 1:87 scale. These multicolor replicas of an Electro-Motive Diesel (EMD) feature a Co-Co wheel configuration and is made of diecast material. With sound function and designed for a two-rail system, this HO scale model is perfect for transportation enthusiasts aged 14 and above. Made in China by Rapido Trains, these brand-new locomotive is a must-have for collectors and hobbyists.