channel balance for two balances 2420 and 2410

A handy person from san diego says:
I need to replace sash balances on some windows in a rental property. They are stamped 2420 and 2410. Here's pics of their ends. I need 10 of each. Thanks, Norm
User submitted picture of channel balance attachments.
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Paul from SWISCO responded:
Thanks for posting, Norm. Can you confirm the length of your balances? Based on their stamps, I think they may be 25", but I would like to double check with you, first.

If they are, then please take a look at our S385-25 for both balances, and a 2420 stamp option for one and a 2410 option for the other. Do you think this would work out for you?
A handy person says:
Thanks, that's the ones, Norm
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