sash balancer replacement #

A quick learner says:
I cannot find a matching # in your specs for Anderson sash balancer replacement.

Here are all the numbers on the original: 11600-17; 1131-2 ; U18-1189

What should I purchase?
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Donna from SWISCO responded:
Thanks for posting!
We are actually bringing in a sash balance that may work as a possible replacement. I will let you know as soon as we have more information!
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Donna from SWISCO responded:
Hello,
Please see new SWISCO product code 24-1133, Andersen replacement balance.
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