Which replacement sash balancer I should order?

A home owner from West Windsor, NJ says:
May 23, 2021
I have stamped marks on my old balancer
BP 30 12#27 9-86
Which do you suggest I order?

Thank you,
Cengiz
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Bob from SWISCO responded:
May 26, 2021

See our 24-1231. This is meant to replace Andersen balances that include the stamp code 1227, or 12#27.
Andersen Sash Balance, 1226, 1227, 1231
Andersen Sash Balance, 1226, 1227, 1231
24-1231
$54.20
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