Need suggestion on choosing the right channel Balance

A home owner from Coppell, tx says:
November 28, 2017
Hello,
I'd like to replace my Alenco brand window channel balancer, the label shown on it is 2790 - 31.
After browsing your websites, I think the 28" SERIES 395 CHANNEL BALANCE is the closest match, however I couldn't find stamp option 2790. my sash window weight is around 31 lbs.
Attached are pictures of my broken balancer for your reference.
Can you advise if 28" SERIES 395 CHANNEL BALANCE is the right one and which stamp option should I choose ?

Regards,
Jim
Channel Balance
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Tom from SWISCO responded:
December 4, 2017
For a balance with the 19-005 and 15-001 attachments, a length of 28", and a 31 pound sash, you can use S395-28 with a 2760 stamp option.
28" Series 395 Channel Balance
28" Series 395 Channel Balance
S395-28
$10.45
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