IWC Window Balance replacements 26 2 AX CMC 11

A home owner from Huntington Beach, CA says:

I am looking to replace a couple IWC window balances. Marking is 26 2 AX CMC 11. Length 27". Window sash weight 11 lbs.

Bottom balance shoe width 1/2" depth 1 1/8".

First time doing this so let me know what other information you need to make sure I get the right product.

Thank you,
User submitted photos of a window balance.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Hello Roger. Please see our S390-27. I think this might be a good match for you.
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