Window Balance 28B

A quick learner from Orlando, FL says:

I am looking for a window balance for a Florida Extruders Intl. Single Hung Window. The window label says it's a series 1000. W/N 04789. 28B stamped on the window part.

User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
I'm not sure what to recommend. Your picture only shoes the bottom nylon attachment. In order to identify the best Series, we will need to see the top attachment, as well. Would you be able to get us a picture of it?
A quick learner from Orlando, FL says:
Here's a picture of the other end.
Profile picture of Tom
Tom from SWISCO responded:
Thank you, however the new pictures are of the same bottom attachment in your first picture, just from the other side. When I mentioned the top attachment, I meant the nylon attachment on the whole other end of the metal channel. We will need that before we can make a recommendation.
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