The MTH 20-21878-1 CSX AC6000 Diesel is a highly detailed model of a diesel locomotive in 1:48 scale. This ready-to-go pre-built locomotive features a multicolor plastic design with digital control system for realistic operation. It is equipped with features such as smoke unit, light and sound functions, making it an exciting addition to any model railroad collection. With its vintage design and brand name of MTH, this locomotive is perfect for collectors and hobbyists aged 17 years and up who enjoy creating their own realistic railroad scenes.