Here is a Lionel 6-16936 O Gauge Susquehanna Sea Land Maxi-Stack Flatcar.
Road Numbers for the Flatcars:
NYSW 16937/NYSW 16938
This set features an articulated three-truck design, four removable containers, plastic trucks, operating knuckle couplers, and metal wheels and axles. It also includes an extra truck to connect it to another TTUX car. This car will not run on O27 curves.

This item has been graded per TCA standards C-8: Like New based on visual appearance. The wheels show average run-time. The instruction manual is included. The original box is included. Overall condition is Like New.

Condition: Like New (C-8)
Operational Status: Not Applicable
Original Box: Yes (P-6)

Manufacturer: Lionel
Model Number: 6-16936
Years Manufactured: 1995 – 1995
Road Name: New York Susquehanna & Western (NYSW)

Scale/Era: O Modern
Model Type: Freight Cars

The Trainz SKU for this item is 6360333.

Trainz Product Id: 11394239