This regulator is most commonly used to supply lower pressure use from high pressure sources. Economical and Rugged this regulator is designed to reduce high pressure of up to 6,000 PSI down to an adjustable lower pressure of 0 to 400 PSI. This is a more sensitive regulator then our standard regulator when being used in the lower PSI range of 0 to 400. This regulator is designed with 1/4 NPT female inlet and outlet, as well as two gauge ports for indicating the inlet and outlet pressures. Gauges not included.