Sash balance 11600-2

A home owner from Waverly says:
I'm trying to purchase the correct sash balance for my 61 x 40 wide Anderson windows, need 4 of them. Picture attached. The numbers I can see on it are 11600-2, and I think 49-1231, hard to see. Thank You.
andersen balance
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Mike from SWISCO responded:
If that stamp says "12#31", we can help you out. "1231" Andersen balances can be replaced by our 24-1231 Andersen replacement balance.
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