Spring balance for MI Vinly Windows 1355 series

A home owner from Germantown, TN says:
Hi,
I am looking for replacement spring balance for MI Vinyl Window 1355 series. The printed info on the spring is #10.0 35". The spring broke. I am interested to know if there is any better quality / more durable replacement for this.
Thanks,
Arvind
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Tom from SWISCO responded:

They don't really make special, more durable versions of coil springs, unfortunately. Most manufacturers pretty much make them one way. All balance springs are typically designed to work for 10-15 years, though. If yours failed before that, then it's not a matter of durability. That means something's wrong.

Either way, we don't have this exact balance setup. We do sell the 15-251, which is a single spring housing designed to work with the Series 160. Look these two products over to see if you could use them to replace your old hardware.

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