The Beautiful Spectrum GN Passenger 9-Car Set in HO scale is a pre-built model train set featuring a vintage design from the Great Northern RR. The passenger cars are painted in a green/orange color scheme and are made of plastic. This limited edition set includes 9 cars with a length of 12 inches each, and a height of 2 inches. The set operates on an analog control system with a two-rail system, making it suitable for model railroad enthusiasts aged 8-11 years old. These cars and boxes are new, and in excellent condition.