It is made of a avery heavy plastic and simply drops from top to bottom of the doorway, like a curtain. Its not a door door like with a doorknob. So when you want to go in and out you move it out of your way like you would a curtain. Its simple, yet quite effective.
Yes. It is just a screen on a spring loaded rod.
Twist the ends of the rod in separate directions. This will lengthen or shorten the tension rod.
Yes it does.
If you buy an additional screen and a separate tension rod it would make more sense, the purpose of the screen is to keep flying insects out, and leaving additional space defeats the purpose of buying the screen to start with.
Two is needed
Yes but it is useless
The rod will extend up to 32".
It will fit a door that is less than 24 in wide..