Coil window balance

A quick learner from Garden grove says:
These are right and left coil window balances in a SWC window approximately 20x40, up and down.
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Thumbnail of the uploaded file named image.jpg
Thumbnail of the uploaded file named image.jpg
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Lauren from SWISCO responded:

Hello, thank you for posting,

Please start by reviewing the style and dimensions of the Series 140 coil balance. It appears that your cover is marked with a 4L, if so, please review the S140-4. This balance can support 4 pounds of weight. Together with the other side, the total sash weight should weigh 8 pounds. Please compare and let me know if you have any additional questions.

Alternate image for S140-4
Alternate image for S140-4

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