Which pivot lock shoe do I need?

A home owner from mankato mn says:
1-1/4"w x 2-16"h x 9/16" thick
picture attached
which part number will work for me
i have 20" s-600 balancer red
User submitted photo of their pivot lock shoe.
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Paul from SWISCO responded:
I would begin your search with the Swisco 15-135 Pivot Locking Shoe, which isn't quite 9/16" thick. If your original pivot lock shoe is indeed a true 9/16" thick, take a look at the 15-129 Pivot Shoe.
A landlord from Chicago says:
The pivot block, though I have not removed it yet appears to be 1 1/2" wide. It may be 1 1/4" but I need to remove it to tell for sure. I don't see any way to remove and replace without breaking the plastic on the frame. Any suggestions.
Don
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Paul from SWISCO responded:
You can use the Swisco 75-069 Jamb Spreader to remove the pivot shoe(s). You should also take a look at this discussion regarding pivot shoe removal.
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