Fitting is made from billet alum. and anodized for corrosion protection. The fitting also has a -6 and -3 provision for the racer to tie in a priming system or plumb in a fuel bleed off.
RBS can also supply many other fitting choices to make any combination that the racer may desire. Note the fitting in the picture is sold as the Y fitting only the other fittings are sold separately. The -12, -8, -6, and -3 are all AN threads and the sixteen ports are 1/8" pipe.