Constructed of 6061 T6 aircraft grade aluminum or stainless steel, each component is CNC-machined for precision fit and unmatched flow.AEROMOTIVE 15610 Orb-10 To An-08 Male Flare Reducer Fitting We offer a complete line of hard to find fittings from OEM specific connections to AN adapters.. All billet aluminum fittings are anodized Type II bright dip black for corrosion protection and unrivaled aesthetics.