The product is a pre-built, ready-to-go electric locomotive replica of the GG-24 by Williams in O gauge. This locomotive features a green color with the corporate roadname of Pennsylvania Railroad. It is made of cast iron and has a wheel configuration of 4-6-6-4. With a length of 13 inches nose to nose and a height of 3.5 inches, this model is designed for transportation enthusiasts aged 17 years and up. The locomotive also includes light function features, making it a great addition to any model railroads and trains collection.