door and window

A quick learner from Safety Harbor, Fl says:
needing two channel balances for NuAir window
the stamp is DB KO3 2950
the channel measure 1/2" wide and metal channel measures 30"
the sash weighs 25 lbs
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hey, thanks for posting. I've narrowed this down to two possible channel balance Series: either our Series 380 or our Series 385 balances.

Now, as you can see, there is only one difference between these two Series, and that is their bottom shoe. The Series 380 uses the 15-005 while the Series 385 uses the 15-004. I can't quite tell what you have based on your pictures, though. Please carefully compare their dimensions to your own hardware and see which is a better match.
15-004 and 15-005
A quick learner from Safety Harbor, Fl says:
it measured 1 3/32", so i ordered my series 385....thanks for your assistance.
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