Window balancer replacement 27" marked 2690 B.S.I or 30

A quick learner from San Diego says:
July 6, 2017
Hi,
I'd like to have a replacement for the window balancer 27" - 2690 B.S.I or 30. I have searched your site and only saw S380-27 27" option 2610 to 2670. Please advise.

Thanks.
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Tom from SWISCO responded:
July 6, 2017
In order for us to determine which balance could work as a replacement for you, we would need to see a photo of it so that we may take a closer look. From there we will be able to provide you with some recommendations.
A quick learner from San Diego says:
July 6, 2017
Included a picture.
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Tom from SWISCO responded:
July 11, 2017
Thank you! I think the weight of your sash might be 30 pounds. I would weigh it on a scale to be 100% sure. If it is, I would recommend the 2650 option.
27" Series 380 Channel Balance
27" Series 380 Channel Balance
S380-27
$10.55
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