Please help identify the suitable replacement for these channel balances

A home owner from San Ramon, CA says:
May 10, 2020
Hi,

I would like to replace these two channel balances but I am not sure model number or option to order. Please help identify the suitable replacement.

Thanks,

Eric
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Casey from SWISCO responded:
May 13, 2020

Hello,

This looks like our S385 channel balance. You'll just need to determine the length of the metal channel and choose a spring strength option based on the stamp number that should be on the balance itself. Thank you!
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Casey from SWISCO responded:
May 13, 2020

That would be an S385-33 with a 3240 spring strength option. Please let us know if you have any other questions. 
A home owner from San Ramon, CA says:
May 13, 2020
The length of the metal channel is 33 inch. However, I don't know how to read the stamp which is (32 4 LV CMC 7). Could you help determine the spring strength based on this stamp? Can I weight the window and determine the spring strength?

Thanks,

Eric
A home owner from San Ramon, CA says:
August 16, 2023
Hi,

I won't like to replace another set of channel balance which is different from the previous set that I have replaced. Please me identify what model and option to order.

Thanks,
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Casey from SWISCO responded:
August 16, 2023

Sure, as long as the bottom fitting has the same 1-3-32" depth as your original balance, you would need the S385-27 with a 2640 strength option.

Close up view of the S385 balance shoe.
Close up view of the S385 balance shoe.
33" Series 385 Channel Balance
33" Series 385 Channel Balance
S385-33
$11.52
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