Id pivot shoe

Hello, thank you for posting, 

Please start by reviewing the style of the 15-087 pivot shoe along with the 15-086 tandem housing. These parts are compatible with the Series 180 coil springs. Compare the dimensions to your original to confirm a good fit! 

Detail of 15-087

Detail of 15-086

The coils should be stamped with a number that indicates the weight option, but if not, please provide the weight of the sash to move forward.

Let me know if you have any additional questions!