Intricately Detailed, Durable ABS Body Detailed Car Undercarriage Metal Wheels and Axles Die-Cast 4-Wheel Trucks Fast-Angle Wheel Sets Needle-Point Axles(2) Operating Die-Cast Metal Couplers Unit Measures: 16 11/16" x 2 1/2" x 3 13/16" Operates On O-31 Curves