1.gas:oxygen,acetylene and LPG 2.Good quality,resonable price 3.18 products These products are used to adjust oxygen or gas pressure, and to measure argon or carbon dioxide flow rate.ModelGasRating Input PressureRating Output PressureGauge Pressure RangeInlet ConnectorOutlet ConnectorInputOutputYQY-01OXYGEN3000psi120psi0-4000psi0-200psiG5/8''x14R(M)9/16''x18R(M)YQY-02ACETYLENE240psi15psi0-400psi0 ...