Sash weight

A handy person from Florida says:
My channels have UB 28F stamped on them. Can u identify the weight from these numbers. Windows are milestone single hung 1000 from Florida extenders int. 4'-5" x 60"
Thanks
User submitted a photo of a window balance.
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Paul from SWISCO responded:
You could have our Series 380 channel balance, but I am not sure. You only show the top nylon attachment. Please compare both your top and bottom nylon attachments to our Series 380 to confirm that they match.
A handy person from Florida says:
Already figured the 380 series will work. I just needed to know which sash weight option would work. I just took the sash out and weighed it though. Came up with 38 lbs. so I ordered the 2860 option
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Paul from SWISCO responded:
I'm afraid a 2860 option is not strong enough. For a 38 pound sash, your balance will have to be custom made with a 2865 option, which can carry 35 through 39 pounds. Check out this Custom Channel Balance Request Form I've started for you based on your specifications and fill out the blank fields. One of our representatives will get back to you with a price quote and an item to add to your cart.
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