Attached are pics of the aluminum MTH 4 and 2 car sets from the video a few posts back. Unfortunately, my photography skills are really bad and the model numbers didn't come out as readable, so I'll re-post tomorrow.
The 2 car set looks like they are 16 inches long and the 4 car set is 15 inches long. I believe the boxes state that they will all run down to O-31 and they run fine on my O-36 layout.