ANDERSON WINDOW SASH BALANCE

A home owner from Hummelstown, PA says:
Hard to read the number clearly, but looking at the photo of the sash balance (included above), it looks like R127827...??? The windows were installed when the house was built in 1989. They are wooden and just go up and down vertically. The bottom window has 3 rows of 3 panes each and the upper window 2 rows of 3 panes each.

I have a number of windows -- all the same -- that need their sash balances replaced and I just need to ensure I order the correct replacment parts...
Thumbnail of the uploaded file named SASH BALANCE.jpg
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Jasmine from SWISCO responded:

Thanks for reaching out! For the balance marked with the R127827, you'll need the 24-R12-827 Andersen Sash Balance. The opposite handed version would be part 24-L8-1227.

Please feel free to reach out with any questions.

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