The Redhorse Performance 3500 series crimp style fittings are cut from 6061 T-6 aluminum on our CNC machine turning centers. Redhorse Performance's custom designed crimp style fittings are engineered to handle high pressure and make assembly quick and easy: just cut the hose, shoulder the hose against the base of the nut, and crimp. Our swivel hose ends allow for quick alignment after assembly and Redhorse Performance's famous hand polishing and color consistent anodizing add the final touch of quality that professional engine builders have come to expect from Redhorse.