Florida Extruders International balances

A quick learner from USA says:
See attachments. The windows are Florida Extruders International, series 1000, installed about 1999. Stamped on the side is LINTOUE 28-0-30, the best I can make out. From metal tip to metal tip it measures 29 1/16 inches
User submitted photos of a window balance.
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Paul from SWISCO responded:
Thanks for posting. Please compare your hardware to our S380-29 channel balance. This comes with a 19-005 balance top and 15-005 (1" depth) bottom shoe. Make sure they match, to confirm. Your spring weight option might be 2830, but you can always weigh your sash to confirm.
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