Help needed identifying window sash support parts

From what you are showing to us, it appears you either may have the Series 775 or Series 860 channel balances with a 1-1/4" balance shoe attached to the chord. Because your pivot bar is currently installed in the pivot bar, we are not sure whether our 26-021 or 26-241 would work in its place. I suggest comparing your part to each of these to see which one would make the better match.