Evaporator core o-ring. lower. PartQualifier: lower. 1/2". 19.1mm O.D. x 11.2mm I.D. 19mm O.D. x 11mm I.D. A rubber Ring with a hole in the center which provides protection through which Heater Core related components pass through. A Seal that prevents oil from leaking out, or contaminants from enteRing the Air Conditioning Evaporator Core. A/C Evaporator Core Seal. A/C Expansion Valve O-Ring. A/C Expansion Valve Seal. A/C Line O-Ring. A/C Refrigerant Line O-Ring. Ambulance. Auxiliary A/C. Engine Coolant Pipe Seal. Exc.Ambulance. Exc.Auxiliary A/C. Included with: AC Hose, AC Line, AC Tube, Center AC Tube, Connector Tube, Cooling Pipe, Discharge Hose, Discharge Line, Evaporator, Evaporator Core, Evaporator Tube, Expansion Valve, Front AC Hose, Front AC Line, Front AC Tube, Front pressure Hose, Front suction Hose, Hose & Tube assembly, Hose and Tube assembly, Hose assembly, Liquid Line, Pressure Hose, Pressure Hose Part cannot be reused/reinstalled, Pressure Line, Rear AC Hose, Rear AC Tube, Rear pressure Tube, Suction Hose, Tube assembly.