#2740 SunAir Window Balance

A handy person from California says:
28" window balance, #2740, from a SunAir window.

What part do I order to replace this?

User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hey, Tony, thanks for contacting us! This looks a lot like our S350-28 channel balance. See what you think. I'd also recommend the 2740 option, of course.
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