Comparison : Item # R242, Push-to-Connect Regulator
Item # R242B, Push-to-Connect Regulator with 2-Position Mechanical Lock Knob
Item # R242G, Push-to-Connect Regulator with Gauge (0 to 160 psi)
Item # R242I, Push-to-Connect Regulator with Instrument Pressure (3 to 20 psi Adjustment)
Item # R242L, Push-to-Connect Regulator with Low Pressure (3 to 60 psi Adjustment)