Size of pivot show and what spring

A quick learner from Indiana says:
I need help with how to determine the pivot shoe size and how to determine what springs are needed.!
User submitted photos of a window balance.
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Tom from SWISCO responded:
Thanks for posting. For your pivot shoe, I'd recommend looking at our 15-070. Your exact type has been discontinued, but the 15-070 has been reported to replace it well.

As for the balance, it looks like the tube diameter is 5/8". If so, I recommend our Series 600 spiral balance.
A quick learner from Windows says:
Would the 15-047 or 15-048 pivot shoe work? I already ordered these. If
not can I return those in exchange for the correct ones?
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Paul from SWISCO responded:
I'm afraid not. At this time the 15-070 is the only pivot shoe we know of that can replace this. You can return the shoes you purchased for a refund, however. See our return policy for more information.
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