Good day,I am not quite sure how to use this rail , are the vertical cords fixed? do I have to sew my blind depending o the width apart of the vertical cords or is the cord width variable. thanks Elaine

Hi Elaine,
Is it our made to measure Roman Blind kits which you are looking at?
If so, you can slide the spools to the desired position, they are moveable.
I hope that helps.
Thanks
Emma