Used extension or rod for the vacuum actuator for controlling dampers and levers on the 1967-68 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 1-15/16 inches long. For 1967-68 Cougar and Mustang, all three vacuum actuators used this same length extension. Vacuum actuator sold separately, see related items.
Stamped with Ford casting number C7ZA-18A318-A. The Ford MPC lists this under vacuum assembly C0AF-18A318-B.