·Chrome-plated brass body with all brass high-pressure chamber ·15 LPM Oxygen models provide 115 LPM flood ·Internal reseating relief valve protects against overpressurization ·CE approved ·2″diameter gauge ·Filtered throughout to trap foreign matter and extend regulator life ·Durable neoprene diaphragm ·Polycarbonate inner and outer tubes provide greater accuracy and durability ·Includes plastic swivel hose barb Gas Type :all gases Input pressure: 15 MPa Output pressure :0.2-0 .3 MPa Safety valve: 0.35 + _0.05 MPa Flow rate :1-15L / min Inlet Connection: G 5 / 8, CGA540, male G 5 / 8 Humidifier capacity:200ml