26.2mmx3mm. 3.0 LITER. Compressor o-ring. PartQualifier: 26.2mmx3mm. A seal that prevents oil from leaking out, or contaminants from enteRing the Air Conditioning Compressor. A/C Line O-Ring. A/C Refrigerant Line O-Ring. Liquid Hose at Condenser. Suction Pipe at Junction. AC o -. Air (A/C) Refrigerant O -. Compressor o -.