I also have a single odd size window that is missing both balancers, so I cannot identify what length units I will need. The window size is 34" high, the tops is approximately 18-1/2" and the bottom is the same size.
The approximate distance of the place the balancers will be installed is 13"-14"from the snap out clip at the top, to the square hole where the bottom of the balancer snaps in.
Also included is a photo of a plastic clip that snaps on to the vertical sides of the window frame that act as spacers/sliders.
Thank you in advance!
Bob

