window balance assembly

A quick learner from Shrewsbury, MA says:
Cant really see the number but thought maybe your experince would help

looks like one is : U8 11L 12 87 and the other is o4 11R 12 87

Thanks, Jeff
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Tom from SWISCO responded:

Thanks for posting. Looks like you need our 24-11L and 24-11R Andersen sash balances. Let me know what you think!

A quick learner from Shrewsbury, MA says:
Hi thanks for your reply - are they about 6 inches long and 3 inches wide? Then I'm good to go!
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Tom from SWISCO responded:

That sounds about right. The length of ours is 6-7/8" and the width is 3". These are pretty standard size, which is why we don't show dimensions on our site. I think you'll be fine.

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