need balance replacement

A quick learner from naples fl says:
please recommend the correct part.
Metal channel is 29" long w/o plastic ends. see attached pics.
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Casey from SWISCO responded:

Hello and thank you for writing in. Take a look at our S380-29 channel balance. This comes complete with a 19-005 balance top and 15-005 bottom balance shoe. Measure the 'depth' measurement of your bottom balance shoe, the way shown in the diagram below, to determine whether or not yours matches up to 1". If it's less than 1" and measures more like 7/8", let us know. 

Alternate view of 15-005
Alternate view of 15-005
Dimensions for 15-029
Dimensions for 15-029
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