This is the specially made grommet which fits into the body to allow the 1/2″ heater hose to go through the body on the right hand side of the bulk head panel, as fitted originally on Mk3 shells to 1989 with round holes in the body as opposed to elongated holes on later shells which then took 5/8″ heater hose and used 2 of CLP6235 on the left hand side of the bulk head.