Replacement sash balances

A home owner from St. John , Indiana says:
Cannot identify replacement sash balance. I have two sets of numbers on my existing balance they are: BJ9 5#27-6-87 and 11600-17 not sure what replacement part I need, can you help?
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Tom from SWISCO responded:
Thanks for contacting us! Based on the stamp of 5#27, I recommend that you take a look at our 24-531 Andersen sash balance.
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