Lauren from SWISCO responded:
February 29, 2024
Hello, thank you for posting, Please review the style and dimensions of the 15-087 pivot shoe that is compatible with Series 180 coils springs. It appears that the housing is marked with a 6, see the S180-6 coil spring. Together with the other side, the total sash weight should weigh 12 pounds. Also review the 16-031 bracket if needed. Let us know if you have any additional questions! Detail of 15-087
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