Correct pivot shoes

A home owner from Providence RI says:
Please help me determine which pivot shoe would be best for this window. The window is a tilt sash. The thickness was 1/2 inch. Also, the window is about 18 years old should I also replace the spiral balances.
Thanks
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Casey from SWISCO responded:

Hello,

Your pivot shoe resembles either our 15-178 or 15-188. You'll need to remove the shoe to accurately measure the width and thickness to see if one of these will work for you. Thank you!

How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
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How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
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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
Anatomy of a tilt window
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