Used -6/-8 fitting. This fitting starts out as a billet chunk of alum. that has a -6 flare on one side and a -8 flare on the other side. Then it is drilled and a steel cad plated fitting is installed that has a -8 ORB and on the other side a -6 flare. Great for returns out of the side of a fuel pump shut off or the choices are endless if you have a use for it. Alum. portion of the fitting is anodized for corrosion protection.