Anderson balancer

A quick learner from Urbana Illinois says:
there does not seem to be a part number stamped on these, the only number I see stamped is 83187 in very large print on there side, the unit measures 2 7/8ths by 6 1/4. The string is incredibly tight, really hard to pull it out to get any slack., Just one of the two strings is broken so I have to hold the one good one while I remove the balancer, really tight!
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Jasmine from SWISCO responded:

Thanks for writing in! I am confident that we can get you set up with the Andersen Sash Balance you need. Although, I'll need to see a clear photo of the stamp you've provided.

Please let me know if you have any questions.

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