Window Part, retainer

A contractor from Florida says:
Hey folks, I got balances that fit for this window and then realized the these pieces were missing as well. They retain the top of the balance in the side of the window. Apparently time and sunlight has gotten the best of them.
User submitted a photo of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Hello! Looks like you have Pan Am windows, which would mean you should consider our 18-187 top sash guide. It looks very similar to your picture, but look it over just in case.
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How to Replace a Top Sash Guide [1080p]
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