The container transport car is loaded with two 20 ft. tank containers. The car has Relex couplers. Three other containers as well as logistics vehicles are included with the set as additional accessories. Contents: 5 no. 24188 straight track, 4 no. 24172 straight track, 1 no. 24224 curved track, 1 no. 24612 right turnout, and 1 no. 24977 track bumper. The set is a great add-on to the Container Train starter set #441-29452, sold separately.