The classic Shor-Line cage continues to set the standard for Stainless Steel animal housing. This assembly is one of our most popular units. There are two 24"W x 30"H cages on top, and it has built-in flexibility with the 48"W x 30"H double door cage at the bottom. It can close off with an optional cage divider to create two openings when needed. Note: The Double Door middle post lifts off easily to slide in a recombinant animal.