Excela-Flo™ High Capacity Compact 2 Stage Regulator (MEGR-295HP) by Marshall Excelsior. Hard-Nose Excess Flow POL Inlet x 3/8" FNPT Outlet - 90° Vent. Packaged option consists of a plastic clamshell with barcode. The MEGR-291H Series High Capacity Compact Integral Two Stage Regulator is ideally suited for high demand RV, outdoor appliances, cabins, seasonal homes, gas fire places, water heaters, ranges or other moderate to low demand domestic home installations.(Green bonnet identifies high capacity model).