Pin Index Oxygen Regulator is designed to reduce the pressure and control the flow of oxygen from a oxygen cylinder or tank. The unit features a built-in flow control valve which maintains a pressure of 50 PSI and provides a variable flow rate within 0-25 LPM when provided with a cylinder from levels that can be safely used by the end user. ME7517 O2 Gas Regulator is intended for the administration of oxygen to patients who need increased oxygen levels to improve their breathing conditions.