About this item Size: JIC -4-4-4 AN (7/16-20) male flare pipe union, to Connect Three -4 AN Female Fittings Together Made of high performance lightweight 6061-T6 cnc machined aluminum Surface treatment: black anodized finish for durability and strength. 37-degree sealing angle design assures leak free performance. The AN thread is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid, Fit all Oil / Turbo Fuel Line / Rail Pump Injector Fitting Precision machined to exacting tolerances for trouble-free performance