Shaft has missing for my window , its height is 34.5. I don't know the brand name of this window.
Tom from SWISCO responded:
June 19, 2019
Thanks for posting! Looks like a spiral balance for a tilt window. Depending on the diameter of the outer tube, you'll want either our S900-35 (3/8" diameter) or S600-35 (5/8" or 9/16" diameter). Let me know what you think!