They are a harder plastic, I would shop for rubber if you are looking to eliminate the issue
I used a small flat head screw driver to pry the plastic spacer out. It came out fairly easily.
These worked for all of my doors; providing the door has a standard removable hinge it should fit.
This fits a standard size hinge pin and the insert can easily be removed to accommodate larger pins. See the attached picture. I just took one off my door and snapped the grommet right out.
can this be ordered in brass with a 5/16 hole for screw