The HO Scale Stewart Hobbies 9181 UP Union Pacific EMD F7B Ph. 1 Late Diesel is a ready-to-go pre-built model replica of an Electro-Motive Diesel (EMD) locomotive in 1:87 scale. It features knuckle style couplers, original box packaging, and is factory painted with a Union Pacific Railroad theme. This analog-controlled diesel locomotive is a part of the two-rail system and is designed for collectors and hobbyists aged 17 years and up. Made of plastic, this model is a detailed representation of the transportation industry's iconic Union Pacific Railroad.