Kato USA Model Train Products Gunderson MAXI-IV Double Stack Car 3-Unit Set: TTX "New Logo" #765690 with UMAX Containers Steel-plastic compound wells give heft and make operation possible even when running empty Included 6 x magnetic UMAX Ribbed 53' continers which can be removed and swapped with other intermodal cars Articulated wells have easy-to-connect/disconnect clips which make transition from storage to operation and back a snap