Mastercool Refrigeration HVAC OFN Nitrogen Air Conditioning Pressure Testing Kit - 53030Product DescriptionMastercools new nitrogen 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. 1/4 SAE flare outlet port, with control valve, to keep pressure on the regulator at all times T-Handle for ease of pressure adjustment 63 mm (2 1/2) gauges with guards High pressure gauge 4400 psig (300 bar) Low pressure gauge 1000 psig (70 bar) 53030: Pressure Testing Regulator Kit includes 53003 Nitrogen Pressure Regulator (Standard BS3) (England), 38 Yellow Charging Hose (47382), Leak Testing Adapter (53042), R410a Straight Adapter 14 FL-M x 5/16 Swivel-F (90413), Blow molded case (53000-PB)Click here to view the Mastercool website