Professional Products Aluminum 4-Port EFI Fuel Regulator features an EFI regulator designed for return style systems where more than one feed is desired to the fuel rails. It can block any unused port with a pipe plug except the return port. It comes with a boost reference fitting and a 1/8 inch NPT gauge port in the side. It has a one 1/2 inch NPT return port, four 3/8 inch NPT inlet/outlet ports. It flows 200 plus gallons per hour with 25 to 75 PSI adjustability. It has a blue anodized finish.