Side piece for sliding window

A quick learner says:
September 18, 2023
Hello,

I need help identifying the part circled in yellow in the attached picture. I have windows that slide up and down.
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Paul from SWISCO responded:
September 21, 2023

Hello,

We can't be sure with your top sash guide still inside the sash frame but I would recommend starting by removing your guide to compare to the 18-188 shown below. If you notice any discrepancies, please get back to us with your written dimensions and we can go from there. Thank you.

Alternate view of 18-188
Alternate view of 18-188

Alternate view of 18-188
Alternate view of 18-188
5/8" Top Sash Guide
5/8" Top Sash Guide
18-188
$1.44
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