This is a 3 rail O Scale Conventional Union Pacific Dash 8-40CW diesel engine that is plastic. This engine has separately applied wire grab ions and handrail stanchions, new truck design with single point lubrication and is highly detailed. The conventional features bell and diesel horn sounds and oscillating ditch lights. Minimum radius curve is O-36 for this engine. The engine is made by Atlas Model Railroad Co. in 2018.