Andersen balances 114 11R 9-89 and 114 11L 9-87

A quick learner from Sterling, VA says:
I have two older (1987) Andersen double-hung windows that have brokem sash balances. The part numbers on the sash balances are: '114 11R 9-89' and '114 11L 9-87', and both bear the number 11600-17. Is the Andersen Sash Balance, 11R, 10SR the proper replacement for me?
A quick learner from Sterling, VA says:
The sash balancers measure 3" x 6.75". My windows are 32" x 72". The markings on the glass are:

11 87/0
XI
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Mike from SWISCO responded:

Hello! You have a Andersen Narroline window that was made in 1998. The balance boxes you need are 24-11R and 24-11L. Thanks for writing in.

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