The body and underframe are injection molded plastic, with etched brass end platforms. Intricate and accurate detail is present throughout. The model rides at the prototypically-correct height above the rails, on ASF 70-ton Ride Control roller-bearing trucks fitted with low-profile metal wheelsets and Keystone cushioned underframe. Simulated cushioned-underframe coupler pockets are integrated into the underframe. The model is equipped with Micro-Trains compatible knuckle couplers.

Western Pacific - Class X72
Western Pacific leased a group of these boxcars in 1972. Painted Tuscan red with deep yellow, black and white printing. Roadname and heralds used with the permission of and licensed by Union Pacific Railroad Company. See provided photos for individual car details.

WP 4056: Class X72 - Serviced 7/72
WP 4059: Class X72 - Serviced 7/72