This is a set of freight containers of various sizes, paired with a Kenworth tractor and trailer, which can flexibly transport various types of goods. I carefully designed this set of containers for my N-scale model railway, which includes four sizes: 20-foot standard height, 40-foot standard height, 40-foot high-box, and 45-foot high-box. The trailer is specifically used to load 40-foot-sized containers. Enjoy your use of it!