NCE: 5240181 Dimensions: 2.6 x 0.350 x .079 inches 66 x 8.9 x 2.0 mm UPC: 816757012025 Direct plug in to Atlas GP39-2, Intermountain SD40-2 plus other plug-and-play N Scale locos Dimensions: 2.6 x 0.350 x .079 inches – 66 x 8.9 x 2.0 mm