This is the silent-bloc bush inside the link bracket for the rear axle tube mounting. On cars before VIN# B106HR there are two bushes per side and one bush per side on the later models. 1946-1955...

This is the small rubber bump stop for the rear shock absorber.  * 2 Per car required and sold separately 1945-1955 Silver Wraith, Mk-6, R-type, Silver Dawn Models

This is the rear shock absorber bushing. 1945-1955 Silver Wraith, Mk-6, R-type, Sliver Dawn