27"window balance

A handy person from Kingman AZ says:
I have Milgaurd Non-tilt windows and are replacing the window balances, the 27" balance ( 1//2" wide ) is stamped
with the number ( 26 9 CR CALDWELL ) the exact model would be a " series 385 but unsure of the rating as the stamped number does not match any of your post numbers ?

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Tom from SWISCO responded:
I recommend weighing your sash on a scale and referring to the chart we show on the S385-27 store page. That will tell you exactly what option you need.
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