ISI ApprovedUsed to regulate the pressure of gas in cylinder during welding, cutting and heating processes.Made especially from forged brass.In this series, there are two types of regulators:Single Gauge: Showing only inlet pressureDouble Gauge: Showing both inlet and outlet pressureComes with German make 'WIKA' pressure gauges which are highly accurate. MODELSA-10X Single Gauge OxygenA-1DA Single Gauge DAA-20X Double Gauge OxygenA-2DA Double Gauge DAA-2AR Double Gauge ArgonA-2CO2 Double Gauge CO2A-2NT Double Gauge NitrogenA-2HY Double Gauge HydrogenA-2MOX Double Gauge Medical OxygenA-2HP+Gas High Pressure Regulator