I unscrewed the nut holding on the pivot rod assembly under my bathroom sink and noticed what you see in the picture. It appears that the rod is encased in some kind of cork substance.
I am not sure if it can be replaced. Is it possible that the rod can be moved forward so I can reattach it to the stopper. I'm doing all of this because it rusted through and won't attach to the stopper as of now.
I am hesitant to move forward without some guidance.