Model: The cars have metal frames and floors. They have detailed trucks with special wheel sets. 4 sliding doors on the car can be opened. The roof walk, ladders, brake system, and additional details are separately applied. The cars come with different lettering. The couplers can be replaced by other types of couplers. Total length over the couplers 46.7 cm / 18-3/8".
DC wheel sets 12 x 32 0552 (NEM), 12 x 32 0389 (RP25).
This car set goes well with these Union Pacific (UP)locomotives: the 37991 "Big Boy" locomotive, the 37973 class 2400 "Mikado", and the 37610+49610 class 600 ALCO PA-1 double unit locomotive.