My window channel is stamped 26C USB. The channel length (metal only) is 27inches, width is 9/16 inch, and channel depth is 5/8 inch. Which channel balance is the closest match?
Paul from SWISCO responded:
March 24, 2015
I see you were looking at our S380-27. Is this what you have? If so, I recommend our 2630 option, though you can weigh your sash and compare to our S380-27 option chart to confirm.