VEVOR Chicken Tunnels, 118.1 x 28 x 24.2 inch (LxWxH) Chicken Tunnels for Yard, Portable Chicken Tunnels for Outside Easy Installation, Chicken Coop Run, Suitable for Chickens, Ducks, Rabbits

This is meant to be an extension of your existing coop or run. The ends of this run are open. There are 2 triangle pieces that you can secure at each end with clips to close off the tunnel.

I have a chicken pin. I added these to that pin and have them wired onto that pin. You can always buy several and move them around. One end is open so you need to buy a small amount of wire to enclose them., if you’re just using these runs.

This triangle is the door. Please see the picture in below link for reference, the link is valid in 3 days:https://we.tl/t-uQj8m6oLXK

Not sure it would depend on size of door and location but the wire opening on tunnel does fold all the way back