This is a Single Stage Brass Regulator with a 1/4 in MNPT outlet connection and 1/4 in FNPT body porting. Also can be used for Scotty 14 liter gas bottles.

This regulator can accept a maximum inlet pressure of 400 PSIG. Single Stage regulators should be used only for applications where an operator can monitor and adjust pressure as needed, or when the regulator is supplied with a nearly constant source of pressure, as opposed to dual stage regulators which are able to adjust for variable inlet pressure while still producing a constant output. A CGA gas type connection chart can be found in the downloadable section below.