Exactly as the picture shows. The wires are very delicate. I would not put anything larger than a hamster in here as it could chew thru the wires. There is no way to get additional tubes or clips. The door is in the middle of the front so it is awkward to move around the middle shelf, it has to be either above it or across the opening.  There is a door at the top which is thankfully in the middle. I had to put the large wheel on its stand and on the bars because the bars where not heavy enuf to hold it. The three stars are because wayfair uses FedEx and they are very incompetent.