2 carb set-up (outlets) with 3/8" N.P.T. inlet on both ends of block and 1/8" N.P.T. outlet on front. Made of cast aluminum, a polished surface and finned for the ultimate in design and appearance. MOON cast fuel block features a large cast-in reservoir, 3/8" N.P.T. threads at both ends and 1/8" N.P.T. on the face.