Anderson narrow Lane window double hung

A quick learner from Akron New York says:
Anderson narrow Lane window double hung are all the sash balancers the same regardless of size of window
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Casey from SWISCO responded:

All of these Andersen sash balances look the same but the weight that they support is determined by the stamp code on the balance itself. You'll need to remove the balance to read the stamp numbers and choose the correct replacement. Thank you!

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