Quick-Connect fittings have become very common on automobiles over the last decade. Simiarly, AN lines and fittings have become very popular among auto enthusiasts and race car builders alike. This fittings is meant to bridge the gap between OEM hardlines and aftermarket braided soft lines. This fitting adapts from an OEM-style 1/4" EFI hardline to a -6AN flare fitting, compatible with aftermarket -6AN fuel lines. Each fitting features a dual-internal o-ring seal for more reliable sealing. Additionally, all fittings are made from 7075-T6 aluminum for more strength and resistance to wrench damage. The simple clip-on design makes attaching to a 1/4" Quick-Connect style hardline (commonly found on fuel rails and hardlines) a breeze.