Replacing coils in window

A quick learner from Oh says:
Iam thinking I need the series 161 for replacement of right and left sides ?
Bottom only
Thanks
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Tom from SWISCO responded:

I don't believe the Series 161 will work for this window. The design of the cam, which takes the pivot bar, is just a little too different.

Instead, consider our 15-087 pivot carrier as well as our Series 180 coil springs. I think these would be a better option for your window.

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