The Ho Scale Athearn Blue box Custom Susquehanna F45 #3636 is a ready-to-go pre-built diesel locomotive in 1:87 scale. This model features a yellow color with a Co-Co wheel configuration, made of plastic material. It has an analog control system and operates on a two-rail system. Standing at 2 inches tall, this locomotive is part of the transportation theme and comes with painted features, perfect for model railroad enthusiasts and collectors.