sash balancer for andersen window

A home owner from north ridgeville, ohio says:
window measures 16"x36 1/2", window 35 yrs. old, no. on sash balancer is D69 7 #27 6 7, or 11600-2, need two rights and two lefts. No. on Andersen window corner is 78/1 if that is any help.
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Paul from SWISCO responded:
Take a look at our 24-737. This can be used to replace Andersen balance boxes with the stamp 7#27.
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