29-3 W replacement

A handy person from Plantation Florida says:
We need to buy replacements for these balance sashs. The code is 29-3 W. We also need to replace the clips to hold the new sash down. Could you please advise? Thank you!
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Bob from SWISCO responded:

Thanks for posting. I believe this might be an S377-30 Channel Balance. Just make sure the top fitting matches our 19-018, which is what comes attached to this balance. It looks quite similar, but review the dimensions below to be safe. Let me know if anything seems off. For a stamp option, choose 2930.

Alternate view of 19-018
Alternate view of 19-018

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