Heravy Duty Single Stage Regulator , 400 PSI Inlet, 5-125 PSI Delivery Pressure
2-1/2in gauges for easy reading 3- 1/4in stainless steel diaphragm for accurate pressure delivery Delrin cap bushing for smooth adjustments Stem-type seat assembly for more reliable performance Forged brass body and housing cap Self re-seating external pressure relief valve on oxygen, inert gas, air, CO2, and hydrogen models Sintered bronze inlet filter Steel Gauge Protectors are color-coded: green for Oxygen GP31X and red for Acetylene GP31Y Models Weight: 4 lbs 13 oz UL listed CGA510, 9/16in-18LHM, Gas: L.P.