4'' x 6 1/16'' #8 Male Flat Face O-Ring4'' x 6 1 16'' #8 Male Flat Face O Ring 66 8344 DIAMETER: 4'' HEIGHT: 6 1 16'' FITTING INLET: 1 2'' Male O Ring FITTING OUTLET: 1 2'' Male O Ring Can be installed on the following vehicles: BUS BLUEBIRD BUS BUS IC CORP BUS BUS OSHKOSH BUS BUS THOMAS BUS BUS THOMAS BUS B2 BUS THOMAS BUS C2 BUS THOMAS BUS LT CHEVY GMC Chevy GMC Bus 40, 50, 60 FORD STERLING F750 BUS INTERNATIONAL NAVISTAR BUS International Fits Bus with Add On Thermo King Unit OEM