Thank you for viewing. This is a Kato N gauge model of the Tokyo Metro Yurakucho Line and Fukutoshin Line 10000 series. 10-1260 Expansion Set A (4 cars) 10-1261 Expansion Set B (2 cars) This is a listing for the above two sets, totaling 6 cars. The basic set is not included. By combining these two sets with the basic set, you can create a full 10-car formation, just like the real train. Will ship immediately.