I have a pcg400 chain drive model which brought this part up by search but is not listed as compatible does this fit the PCG400?
No, sorry the 34516R.S Inner Slide will not work with model PCG400. There is no replacement.
I have a GCG350 but mine doesn’t look like this. It’s taller than this.
This will work with the GCG350.
Is the magnet included?
Yes, it is.