This is an original NOS master cylinder to body grommet for the M151 and M151A1 MUTT series jeep. This fits up on the fire wall just under the hood on the drivers side. These are very hard to find and I have a very limited supply of these originals. This is the boot or grommet that goes between the body and the master cylinder opening. This is the early style seen on the M151 and M151A1 jeeps.