Need to replace

A home owner from Indiana says:
Windows are 18 years old. Unsure of brand but locking mechanism has PRISM molded on iy
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Casey from SWISCO responded:

Hello,

I can't say for sure which parts you need while the hardware is still installed but you can start by comparing the style and dimensions of your pivot shoe to our 15-192 and Series 170 and Series 171 coil springs. Take a look once you've removed the hardware and let us know if you have any other questions. Thank you!

SWISCO S170 and S171 Coil Balance Assembly
SWISCO S170 and S171 Coil Balance Assembly
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How to remove window pivot shoes
How to remove window pivot shoes
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Anatomy of a tilt window
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