Non tilt vinyl window channel replacement balance parts

A quick learner from Kissimmee, FL says:
Parts have no markings other than 28-B
Measure at 29". Each end is the winged clip version. Not certain of window OEM maker.
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Emily from SWISCO responded:

Hello!

At first glance, this looks like it could be either our S380-29 or S385-29 channel balance. The S380 uses a 1" bottom fitting and the S385 uses a 1-3/32" fitting. However, your bottom fitting looks like it might be less than 1", possibly 7/8" like our 15-029 shoe. Pictures can be deceiving so we suggest measuring as shown below to confirm. Let us know what you find and we can go from there.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
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