Flame Technologies VMAR-22 Medium Duty Acetylene Regulator, Victor Compatible Forged brass body & bonnet for maximum strength Oxygen with safety relief valve for safe operation Sintered metal inlet filter to trap impurities Easy to read dual scale gauges with hardy acrylic screw-on lens OEM compatible -Single Stage Acetylene Delivery Pressure 2-15psi Acetylene Max Cylinder Pressure 400psi Gauge Diameter 2 inches