This part inserts on both sides of the sash that allows it to go up and down.

A home owner from Lake Katrine NY says:
October 13, 2020
This is a comfort plus window circa 2001.
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Casey from SWISCO responded:
October 16, 2020

Hello,

You'd need to remove an undamaged pivot bar to confirm but you can start by comparing our 26-423 pivot bar to yours. Thanks for posting!
Pivot Bar
Pivot Bar
26-423
$3.55
Removing Rusted Pivot Bars
Removing Rusted Pivot Bars
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Anatomy of a tilt window
Anatomy of a tilt window
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