Can you identify this missing "pin"(?)

A quick learner from Pittsburgh, PA says:
November 18, 2023
I do not know if they are even pins. I just know the house I moved into has one window that if I unlock, the upper window falls immediately. It is the only window in the house that does not have these on both sides of the top window. I was told they're called weights, but have not been able to find anything remotely similar. I'd love a link if you're able to find them online. Thanks!
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Jasmine from SWISCO responded:
November 20, 2023

Thanks for writing in! The part you are searching for is part of vent stop. Unfortunately, it is not something sold separately. The good news is that we do carry a replacement for the entire piece. Take a look at our 26-354 Sash Vent Stop. Carefully compare the dimensions and design to confirm that this is the correct replacement.

Detail of 26-354
Detail of 26-354
Sash Vent Stop
Sash Vent Stop
26-354
$2.15
How to Replace a Window Vent Latch
How to Replace a Window Vent Latch
VIDEO
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