Casey from SWISCO responded:
February 22, 2023
Hello, I would recommend removing your pivot shoe from the window to compare to the 15-177, which uses the Series 152 coil springs that you mentioned, along with the related items shown on our product pages. It sounds like you may also be looking for replacement pivot bars that engage with the metal cam of the pivot shoe. If so, we would need to see a photo of the part removed from the window and written-out dimensions to compare to our inventory. Thank you. Alternate image for 15-177
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