16.5mm. 2.0 LITER GAS. 2018-20. Inlet hose o-ring. PartQualifier: 16.5mm. 16.5 x 1.78mm. A/C Line O-Ring. A/C Refrigerant Line O-Ring. From Chassis/VIN B52041. Suction Hose at Compressor. AC seal. Air Conditioning (A/C) Refrigerant O -. Compressor o -. Inlet o -. Liquid o -. Pipe o -. Suction o -. Included with: AC Hose, Inlet Hose, Liquid Line, Pump assembly.