Amriacn DOUBLE UNIT DIESEL(2003) U.P. ALCO PA-1 Double Unit Diesel. Last chance we will not carry any more this item. Till stock exhausts.The mighty ALCO PA-1 is an ideal model for American passenger and freight trains. The frame and body of this stylish locomotive are constructed of metal and the impressive technology and numerous features make the ALCO PA-1 a wonderful addition to your layout. Prototype: Union Pacific Railroad (U.P.) class 600, American Locomotive Company (ALCO) type PA-1. Use: Passenger and freight trains. Model Features: H0 scale, 2-rail DC Class 600 Diecast metal frame and body 5-pole high-efficiency motor in both units Comes from the factory with a built-in DCC-Selectrix decoder for harmonized control of the two motors Can also be used in analog 4 axles powered RP 25 wheel flanges, no traction tires Kadee?compatible couplers Special close coupling between the two locomotive units Headlights and lighted number boards Prototypical blinking Mars headlight Length over the couplers: 18-5/16