... gauge, pressure gauge, for refrigeration and air conditioning2.75" Refrigerant GaugeCompoundPressureR134a400RG134L400RG134HR410a400RG410L400RG410HR12,R22,R502400RG250L400RG250HR12,R22,R134400RG300L400RG300HR134a,R404a,R407c400RG350L400RG350HR134a,R404a,R410a400RG500L400RG500HPrimary ...