From Lionel NASCAR Collectibles. Justice League, assemble! Earth's mightiest heroes unite on this Made in the USA train of U.S. & imported parts boxcars, each decorated to spotlight a different member of the league. These collectible 2-packs are sure to be a conversation piece on your existing layout or the perfect gift for the Super Hero in the family! Features include die-cast metal sprung trucks and operating couplers, metal frame and opening doors. Traditional O-Gauge; Minimum Curve: O-27. Collect Batman/The Flash and Superman/Green Lantern.