Need 6 replacement window spring balance assemblies

A home owner from Sarasota, FL says:
Marked 28D on channel. 29" long 1/2" channel width
User submitted photos of a window balance.
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Tom from SWISCO responded:
Thank you for reaching out to us. We would like to recommend for you to please take a look at our S380-29 channel balance with a 2840 option. Get back to us and let us know if this is the best match for you.
A home owner from Sarasota, FL says:
I ended up ordering these already and that is what I ordered, S380-29 with 2840 option. They were an exact match and are working perfectly. Thank you!!
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