The Stainless Steel Cat Suite is the flagship of our Stainless Steel feline housing. We developed it in conjunction with University researchers to address the need for double-compartment housing that lowers the stress for felines. This unit is a single unit (36W) that you can stack and place on an optional stationary or mobile platform. Product features: Premium features reduce stress for recovering or boarding cats. Patented Hinge Design US Patent #7,805,808. Our silent-closing latch keeps the environment low stress. Stainless steel door design features extra tight spacing at the latch to discourages paw entrapment. Lockable door latch to prevent escapes. You can open or close the portals from the outside without opening cage doors or disturbing occupants. Interior polymer components are made of chemical resistant Polyethylene (PE). Exterior is 48W x 30H x 28 ¼ D.