Bob from SWISCO responded:
February 21, 2020
Thanks for posting. I'm not familiar with this kind of Top Sash Guide; it honestly looks like an unusual setup. I'm forwarding this discussion to one of my senior colleagues, and we'll get back to you as soon as we can with more information. Many thanks. |
Paul from SWISCO responded:
February 21, 2020
Have a look at our 87-153 sliding window roller. Carefully look over our measurements and let us know what you think. |