Andersen Sash Balance 11600-17 J40 519 12-87

A quick learner from Syosset New York says:
I need a sash balance replacement for an Andersen double hung window both upper and lower sash ar 20.5 inches wide and 16 inches high. both are double glass. The part number on the existing sash balance is 11600-17 J40 519 12-87 Attached are some photographs. Which replace part is the correct one? Philip
a user submited photo of window sash balance
Profile picture of Donna
Donna from SWISCO responded:
Thanks for contacting us! Please take a look at our 24-531 Andersen Sash balance. This can be used to replace balance boxes with the stamp 519.
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