Replacement spring assy MI 3500CHS

A quick learner from Illinois says:
February 10, 2018
Need a replacement spring assy for a MI 3500CHS...any ideas? Want a kit to replace all attachments and springs
User submitted photos of a window balance.
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Paul from SWISCO responded:
February 15, 2018
If you want a self contained balance system kit, you could substitute your hardware with our Series 140 and still use the same pivot bar that's in your the sash. Can you just tell me the exact weight of your sash? That will help us determine which Series 140 will work.
12" Series 400 Spiral Balance
12" Series 400 Spiral Balance
S400-12
$9.32
14" Series 400 Spiral Balance
14" Series 400 Spiral Balance
S400-14
$9.32
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