Emporio Rossi sells silent blocks of the following brands:
The silent block is a bushing with a gap between the internal surface and the external rubber surface.
When used in tie-rods, reaction bars or leaf springs , this particular bushing dampens friction and reduces stress among the various mechanical components.
As every rubber component, it is subject to wear and tear, over the years. This is why the silent block system has to undergo periodical maintenance, like bushing substitution.