Used extension or rod for the vacuum actuator for controlling the A/C heat door on the 1969-73 Mercury Cougar or Ford Mustang factory integral A/C boxes. This gets screwed onto the tab on the vacuum actuator, which make the unique part numbers from the Ford MPC. About 1-13/16 inches long. For 1969-73 Cougar and Mustang. On the driver side of the blower assembly. Vacuum actuator sold separately, see related items. This is an unstamped tab, and is plain steel color.
Ford part number 18A318.