Vinyl window parts

A quick learner from SCHENECTADY NY says:
I think these are called coil balances they work but the cams are disintegrating and the sash pivots are breaking also when trying to remove the sash
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Bob from SWISCO responded:

Thanks for posting. This looks like our 15-177 Pivot Shoe. This shoe is compatible with our Series 152 Coil Balances. For a new pivot bar, see our 26-030

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