Old double hung aluminum windows

A quick learner says:
Need the springs and the brackets that attach to the bottom of the window. Can you help?
double hung windows
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Paul from SWISCO responded:
I believe we can replace this. We will need the diameter and length of the plastic balance tube, though. Please update us!
A home owner from Key West says:
I would need four of each shown in the photos.
User submitted photos of a window balance.
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Paul from SWISCO responded:
Thank you! Please see our S500-23 and S500-24 spiral balances. The bottom balance bracket looks like a match for our 17-012, which hooks onto the balance spiral. Let me know what you think, or if you need help reinstalling the new hardware.
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