Williams by Bachmann Trains - Up Heritage - Western Pacific Locomotive Union Pacific SD-90 diesel locomotive - Numbered and decorated to honor the year this railroad became part of the Union Pacific system Features: 6 wheel power trucks with traction tires, dual motors, flywheel coasting action, all metal gears True Blast II digital horn and bell, dual headlights, operating couplers Die cast: trucks, truck sides, pilots, and fuel tank Navigates O-31 curves