It's actually 2 cages and a stand in the picture. An Animal Plastics 8" stand, an Animal Plastics T12 cage (48" x 24" x 24" - L W x H), and an Animal Plastics T8 (48" x 24" x 12" - L x W x H)
You can stack any combination of AP cages as long as the cage has the same footprint (in this case 48" x 24")
Here is a thread I wrote on them: http://ball-pythons.net/forums/showt...With-Pictures!