Anderson Narroline Counter Balance

A home owner from Honor, MI says:
Numbers imprinted on counterbalance are # 1031 SO 6/4, What to I order from SWISCO. to replace?
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Tom from SWISCO responded:

Hello! Based on your old stamp of "1031," I feel confident that our 24-1033 is what you want. This is what Andersen recommends for balances with that marking.

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How to replace an Andersen Window Balance
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