The Athearn 8803 Southern Pacific SD-45 diesel engine is a 1/87 scale replica of the SD40T-2 model, featuring realistic details such as applied handrails and added lights on both ends. This model is designed to run on HO scale couplers and operates on a two-rail system, suitable for both digital and analog control. With a red and gray color scheme and the corporate roadname of Southern Pacific, this plastic locomotive is a ready-to-go piece for model railroad enthusiasts looking to add a piece of SP history to their collection. Made in the United States by Athearn, this diesel engine is a must-have for any train lover. This item has not been tested.