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B-unit Features: Dual Precision-Control Odysseys Motor * Substantial, Finely Finished Die Cast Trucks, Electrocouplers (Front), Fixed Coupler (Back), and Fuel Tank * Sturdy Metal Chassis, Wheels and Axles and Handrails * Detailed Molded Body * Diesel Smoke Generator * Minimum Radius: 0-31 * Length: 16 3/4"