16.5 Long ea. Durable ABS Intricately Detailed Bodies. Metal Wheels and Axles. Operating Die-Cast Metal Couplers. Colorful, Attractive Paint Schemes. 4-Car Sets Feature: (1) Baggage, (2) Sleepers, (1) Observation. Unit Measures: 16.5″x 2 5/8″ x 3 5/16ea. Operates On O-31 Curves.