AN6 AN8 AN10 Female Thread Aluminum Pipe External Hex Head Flare fiting TUBE NUT End Cap Plug Fitting Coupler Connector AdapterThe AN thread is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid. It became popular for usage within Professional racing for the ability to easily customize new lines. From there it s usage spread to the aftermarket automotive performance field for its ease in adaptability, upgradability and durability. Specifics and Features: Made of High Quality Lightweight T-6061 Aluminum Material Anodized Finish for Strength and Durability Fitting Diameter:AN6,AN8,AN10 Includes: 1 x Fittingchoose the size you need Notes: 100% Brand New Professional Installation is Highly Recommended Installation Instruction is NOT IncludedIncludes:1 x Fittingchoose the size you needsizedetail