spiral balance replacement

A home owner from Arlington, Texas says:
I need to replace the two spiral balance of a single-hung window. The tube is 24" long and 3/8 " diameter. It does not look like the ones that you have; please see
attached photo for detail. The house was build in 1991 and the window came with the house.

Thank you very much.
User submitted a photo of a window balance.
Profile picture of Donna
Donna from SWISCO responded:
Hi Dave,
Take a look and compare it to S400-24, this is a non-tilt spiral balance with a 3/8" diameter tube.
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