A:AnswerIt comes with a plastic cover. You cut it according to the measurement of your window. As for what holds it in place, it sits on your window and has a bracket on the outside for support.
A:AnswerHi Summer! Thank you for your inquiry,. We were able to see the recommended window height minimum/ is 21-1/2" and the maximum is 40". For proper installation, the recommend dimensions given are recommended exactly. We hope this helps. -Thanks!-
