Window balancer stamped 28BP

A quick learner from Lakeland Florida says:
Window balancer stamped 28BP.do I need sash weight range 28B
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Jasmine from SWISCO responded:

Thanks for posting. I am confident we will be able to offer a replacement, however, I'll need a bit more information.

To start, I will need to see an undamaged balance; specifically, the top and bottom nylon fittings. I will also need to know the width of the metal channel as well as the length (only the metal).

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