Good used grommet that seals the heater hoses and A/C lines where they pass through the firewall on the passenger side. This part will not have any missing "chunks" but will show hairline cracks most evident where the heater core tubes pass through. Taken from a 1970 Cougar.
Ford Part #: C9ZA-19B588-C.
* Note - Used starting during the later part of 1969. Compare the evaporator line orientation for both years.