Replacement Channel Balance

A quick learner from Sarasota, Fl says:
I have Unique 28-C-30 and see that your S380-29 matches the length and top 19-005 attached. As you can see in the picture attached the bottom fitting appears to be different. A previous post indicated option 2830 was needed. Is this what I need for the bottom? If so, is it attached before shipping?
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
I agree, this looks like our Series 380 channel balance. The shoe is a little different but that shouldn't matter too much. It's close enough that you should just make sure the size is the same. Both 15-005 and 19-005 are attached before shipping. Your stamp corresponds to our 2830 option, but you can always weigh your sash to confirm.
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