Window replacement parts

It appears you are showing us two different windows in your photos. We will need to see some close up photos of the part you are trying to show in your first two photos. As for the last show, it seems you may have a Nuprime window that uses a side load balance. Our 18-110 top sash guide may be a match. Look over the measurements to see if it's a match. We also placed some helpful videos on this page for you to look over.