... body and steel cover, plastic knob, double gauges, with safety valve. Oxygen RegulatorUsed with welding machines, has big brass body and steel ... cover, plastic knob, double gauges, with safety valve.Features: 1) Inlet pressure: 15mpa2) Adjusting range: 0 ... and internal9) Pressure range: 0-2.5mpa, 0-25mpa10) Scale: single or double scale with psi (lb/in), bar, kg/cm2 (kgf/cm2 ...