Left.BUMPER COVER & TRIM. Right.BUMPER COVER & TRIM. Side cover retainer. A rubber ring with a hole in the center which provides protection through which Bumper Splash Shield related components pass through. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Bumper Corner Cover. Bumper Cover Grommet. Fender Liner Grommet. Fender Liner Nut. Mud Flap Grommet. Mud Flap Nut. Mud Guard Grommet. Part cannot be reused/reinstalled. Quarter Panel Splash Shield Grommet. Quarter Panel Splash Shield Nut. Rocker Panel Molding Grommet. Wheel Arch Molding Grommet. Included with: Bumper Cover.