Correct replacement part Unique Balance 27F 12:10:58

A home owner from Florida says:
I have a 28 in balancer "Unique Balance 27F 12:10:58`
User submitted a photo of a window balance.
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Tom from SWISCO responded:
Thanks for posting! Based on this image, I think you might want to look at our S770-27 balance with a 27F stamp option. Does that look about right? Keep in mind that the 27F option can carry a window sash weight of 30 through 34 pounds. Does your sash's weight fall within that range?
A quick learner from North Venice FL says:
My window sash weight is 39.4 pounds. I have seen another post that talked about a custom balance. I will need to buy 24 balances.
Can you send me the custom order form and pricing?

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Tom from SWISCO responded:
Ah, I see. Yes, your balance will have to be custom made with a 27H stamp, which can hold 38 to 42 pounds. Take a look at this Custom Channel Balance Order Form that I have started for you and fill out the rest of the information. One of our representatives will get in touch with you shortly thereafter!
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