Made from heat treated plated steel this fitting adpt. allows a racer to connect a -4 female fitting to 1/8" male pipe threads which will allow the racer a complete liquid filled gauge/dual regulator kit in a small and tidy package.
Wrench hex is .562" and fitting swivels allowing the racer perfect placement of there dual regulator for plumbing purposes.
Picture four, five and six are shown to give the racer an idea on how to plumb and connect all the parts when using a 150/250 all in one regulator but each piece is sold separate.