Mastercool's nitrogen pressure regulator is specifically designed to meet the specifications of HVAC/R and automotive A/C systems. This single stage nitrogen regulator is used to test systems for leaks when they do not contain refrigerant. This unit has a ¼” SAE flare outlet port, with control valve, to keep pressure on the regulator at all times. The large “T” handle provides easy pressure adjustment while the 2 ½” gauges with gauge guards are extremely easy to read in any environment. This kit comes packaged in a blow molded case with a nitrogen pressure regulator (standard CGA580), 38” yellow charging hose and leak testing adapter.