They are more like coned rubber grommets/donuts.  Mmmm....donuts.

Anyway, they are often broken/worn, if they are cheap, order new
ones.  If they are expensive, order 2.
and install the your best old ones at the top and the new ones at the bottom.

Or, if the dealer is too expen$ive, go to a hardware store and find
something similar once you take off the old ones...

-paul

>Just getting ready to place my winter Westy parts orders for the
>upcoming repair season...I mean camping season.  I will be replacing my
>original radiator and just wondering if I should order new mounting
>gaskets (p/n 431 819 225) that are at the top and bottom of the rad,
>they look like they may be a foam type gasket looking at ETKA.  Are
>these gaskets usually replaced when fitting a new rad?  Thanks