coil balance shoe

A quick learner from KS says:
How do I know which balance shoe I need to get? Below shows 15-175 and 15-177.
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Bob from SWISCO responded:

Thanks for posting. Did you try an upload a picture of your original shoe? If so, I'm afraid I do not see it. Could you show us a picture of the shoe out of the window? That will help us determine what you need. Many thanks.

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