Channel Balance Help

A purchasing agent from Nashville says:
I am looking to replace two window ballasts on my window.
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Bob from SWISCO responded:

Thanks for writing in. This appears to be a S770-25, but with a stronger stamp option than any of our stock items. Please confirm that your balance matches the Series 770. If so, we can provide balances for you with the 25F stamp option via a custom order. I am sending you an email with a custom link now to order a pair. Note that our Series 770 balances come with a metal channel that has a white finish. If you'd prefer balances that have that plain metal finish, let me know and I will prepare a different quote for you. Many thanks.

How to replace a tilt-window channel balance.
How to replace a tilt-window channel balance.
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