Window balances for milestone single hung series 1000

A quick learner from Florida says:
Window balance length is 29"
Stamp reads 28C USB
Last attached image is a sticker from the window
Milestone single hung series 1000
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello! I believe you have our S380-29 channel balance, but just make sure that the nylon attachments are the same size; especially the shoe!
A quick learner from Florida says:

thank you for your response.
Series 380 and 385 look the same and look like my balances, thus i'm not sure which to get.
please advise,
A quick learner from florida says:

What are required options when i try to check out?
please see the attached.

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Tom from SWISCO responded:
The difference between the two Series is the nylon attachments. As Paul mentioned, you need to measure your own to confirm which is a better match.

The stamp option determines the strength of your spring. Based on your current stamp of 28C, I would suggest our 2830, but you should weigh your window sash just to confirm. We have a chart under each balance that shows how much weight each option can support.
A home owner from Ocoee FL says:
I have a milestone single hung series 1000 i need to replace the bottom window sash. I had replace the window pane some year back and it broke during the last hurricane i bought the glass at the local hardware store i am now told it wasnt hurricane grade
Profile picture of Donna A.
Donna A. from SWISCO responded:
I'm sorry, but we do not sell window sashes. We sell replacement hardware. Try a local glass company in your area.
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