Cat door installed on the wall for $16.00

I have a lovely cat who needs her own door for in and out.
Used to open the sliding door for the summer season.
But I need to install a cat door on the wall for the winter season.
purchased a cat door from Amazon for $16.
This is for the door not for the wall which is only 2/1/2" thick and no telescoping.
So, I had to extend it to 5 1/2" thick.
It came up very good ^^
My cat loves it.
John's Ranch