This is a 35 inch counter balance I need 2

A professional from Manalapan NJ says:
May 26, 2020
I'm sorry but I don't even know the make of the window I cannot find a name anywhere.
I did take a close-up of some numbers on the back of one .
I hope that will help thank you
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Casey from SWISCO responded:
May 29, 2020

Hello,

I believe we can replace these but the balance in your photo is missing some important details. We'll need to see an undamaged balance removed from the window, including the clip at the end of the cord, the end attachments and the area where the balance screws to the jamb. With this information, we should have a much better idea of what you need. Thank you!
A professional from Manalapan NJ says:
May 30, 2020
I hope these photos help !!!
The piece is 35 inches long so it's hard to get a full clear shot
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A professional from Manalapan NJ says:
May 30, 2020
I hope these photos help !!!
The piece is 35 inches long so it's hard to get a full clear shot
I'm sure you know but the end where the string is is the bottom and where the hole is that would be the top thank you hope this is helpful
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Casey from SWISCO responded:
June 1, 2020

Great. Take a look at our S770-35 channel balance. There should be a stamp on your metal channel that will tell you what spring strength option to choose. Thank you!
A professional from Manalapan NJ says:
June 1, 2020
Yes that looks perfect thank you so much !!
I would like to order two of them .
The first set of photos has the stamp in one of them . It reads 35C and BSI next with sideways I'm guessing that it ?
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Casey from SWISCO responded:
June 1, 2020

Great. Then you can purchase the balances directly on our website and choose 35C for your strength option or you can call our customer service department at 856-317-6263 if you would like assistance placing your order. Thank you. 
35" Series 770 Balance
35" Series 770 Balance
S770-35
$13.82
How to replace a tilt-window channel balance.
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