Car Strut Top Mounts.
Strut mounts have multiple roles: First, they have to keep struts firmly in place and absorb some of the shocks from road bumps.
Second, they have to provide a good sound insulation, or the road noises and vibrations will travel from the struts through the vehicle’s body and into the cabin. For this reason, strut mounts have a rubber cushion, so there is no metal to metal contact between the strut and the body.
Third, in cars with MacPherson struts in the front end, front struts turn together with the front wheels when steering left or right. To allow for that, front strut mounts in these cars have a strut bearing.