Drive regulators feature a protective contents gauge and a built-in pressure relief valve for safety. Mini regulators offer the same function as standard regulators while facilitating an easier fit into oxygen carry bags. Easy to operate single selector knob. Lightweight and durable design. Meet or exceed accuracy standards for ASTM, American National and CGA. Inlet Pressure: 300 - 3,000 PSI. Outlet pressure: 50 PSI. UL Approved.