This is a Micro Trains 99301760 N TTX Well Car set of 16. Since the early 1990s, 70’ Husky Stack intermodal well cars have been found in long unit trains on every major Class 1 railroad from coast to coast. These cars can each carry up to two containers, the bottom well position holding a 48’ container and the top holding containers up to 53’ in length. Each car features plastic trucks, micro couplers, and plastic wheels and axles.