Replacement Coil Balance for double hanging window.

A home owner from Indiana says:
The markings "7 A J" are on the coil and # 7 on the shoe balance.
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A home owner from Indiana says:
Is the left side of the window.
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Lauren from SWISCO responded:

Hello, thank you for posting,

Your balance assembly resembles the 15-087 pivot housing that is compatible with the Series 180 coil springs. Compare the dimensions below to confirm a good fit! For a coil stamped with the number 7, please review the S180-7 that can hold 7 pounds of weight. With the other side, the total sash weight should be 14 pounds. Also review the 16-031 bracket.

Let us know what you think and fi you have any additional questions. 

Detail of 15-087
Detail of 15-087

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