I have a set of Windows (4)that came out of my Bigfoot truck Camper these are double pane windows which are also heavily insulated for cold weather. The windows did not leak at all the gaskets creep onto the inside so they look a little bit odd some windows are better than others. I also have a brand new window that was ordered the wrong size if you are building a truck camper or wanting to replace some windows these work perfect. $100 each or make me an offer on the whole set.