These 52' 6" flat cars (first released in 2014) have ramps that can be lifted up and down. Equipped with body-mounted E-Z MateŽ Mark II couplers (optional set of Rapido couplers also included). The removable 35' piggyback trailer features graphics to match the prototype.
I don't know what specific prototype these models are based on (if any), but TOFC flat cars of this general type were first built starting in 1944 and are still in use today.