Picture is of 4 car set but what listed is the 2 Car add-on. Intricately Detailed, Durable ABS Bodies. Colorful, Attractive Paint Schemes. Metal Wheels and Axles. (2) Operating Die-Cast Metal Couplers. Constant Voltage Colored LED Body Lights. 2-Car Sets Feature: (1) Sleeper, (1) Diner. Unit Measures: 16 11/16″ x 2 1/2″ x 3 5/16. Operates On O-31 Curves.