SpeedFX adapter fittings are manufactured using lightweight 6061 aluminum. All adapter fittings are compatible with most manufacturers hose and hose ends and feature a 37 Degree sealing surface which creates a leak proof seal. SpeedFX adapters are anodized which creates a corrosion resistant finish. SpeedFX adapter fittings are made in the U.S.A..Used With Holley Ultra HP Dual Inlet Carburetor -6AN x 3/8 Inch NPT Port Anodized Black Stainless Steel Braided HoseFeatures and BenefitsManufactured From Lightweight 6061 Aluminum And Are Fully Reusable 37 Degree Angled Sealing Surface Creates A Leak Proof Seal Anodized Adapter Fittings Creates A Corrosion Resistant Finish Compatible With Most Hose And Hose Ends Made In The U.S.A.Compatibility: Holley Ultra HP Dual InletTitle: Carburetor Fuel LineInlet Attachment Type: Male ThreadsInlet Attachment Size: 3/8 InchOutlet Attachment Type: Male ThreadsOutlet Attachment Size: 3/8 InchFinish: AnodizedColor: BlackMaterial: Stainless Steel Braided Hose