CFR EMC EVOLUTION X MODULAR -20AN MALE TO -20AN MALE COUPLING FITTING CFR -20AN male to -20AN male coupling fitting *Note that each Evolution radiator modular system unit has 7 separate -20AN connection Locations for individual needs *Does NOT include O ring HZ-40030 -20AN male to 1.25" Radiator Hose Fitting. HZ-40031 -20AN male to 1.75" Radiator Hose Fitting. HZ-40032 -20AN male to 1.50" Radiator Hose Fitting.