These Air-o-lite windows are very difficult to find. They are aluminum on the exterior with some steel parts on the interior. Most of the windows appear to be complete with all hardware. Some have cracked or missing glass. These window were cut out with a saw (as per photos) so to re-install the window the rivets will need to be drilled out. This part number includes 4 small opening windows and a center window which does not open. If you have specific questions, please give us a call at 765-473-8088. THIS WINDOW SET IS FOR PICK-UP ONLY IN PERU, IN. WE WILL NOT SHIP THIS WINDOW SET.