Andersen counter balance

A home owner from Vestal, NY says:
I need replacement balances for a Narrowline 3046. I see 2 numbers stamped, 11600-17 and S5 1027 9-87
I have attached a photo. Please advise which of your items I need. Thank you.
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Lauren from SWISCO responded:

Hello, thank you for posting,

Please review the 24-1033 Andersen sash balance that is used to replace balance boxes stamped with the number 1027. Let us know if you have any additional questions. 

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