Vinyl tilt window replacement parts

A quick learner from New York says:
I'm not sure which item on your website this would be. I need a different amount of times. Some I would have to replace both parts and others just the bottom.
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Lauren from SWISCO responded:

Hello, thank you for posting,

Your balance assembly resembles the 15-177 pivot shoe that is compatible with the Series 152 coil spring. Please review the dimensions and let me know if you have any questions. 

Alternate image for 15-177
Alternate image for 15-177

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