Vinyl window force spring fits in jamb of tiltable window.
A contractor from Long Island says:
October 11, 2016
I need to replace a half dozen force springs in three vinyl Windows, I can't find identifying label, but did take pic
Paul from SWISCO responded:
October 14, 2016
Thanks for posting. Please see our 15-087 pivot shoe, Series 180 spring, 15-086 coil housing, and 16-024 mounting bracket. I think you'll find this hardware closely matches what you have installed.