These rails are for tip out windows the metal part of the rail measures 24" x 1/2" x 1/2" I hope you can help the cord attaches at the top with a screw.
Lauren from SWISCO responded:
November 28, 2023
Hello, thank you for posting,
To further review, is there any type of attachment or hook at the end of the pulley cord? Seeing any attachments will help us identify the series your window uses.