Features and Benefits: Deluxe H2/N2 Leak Detector, certified compliant with SAE J2790, Works with both R-134a and R-1234yf; Uses 95% Nitrogen /5% Hydrogen mixture to find leaks electronically; 96" Red Service Hose, H2/N2 Regulator with 2" delivery and contents gauges; R-134a and R-1234yf HS Manual Couplers with 1/4" MF; Protective plastic carrying case; FJC continues to forge an impressive path at the forefront of automotive A/C technology. To that end, our new "Power of Nitrogen" line is unmatched as a dependable and solution for a variety of air conditioning needs. Nitrogen is safe, inert, odorless, portable, and low in moisture content, making it ideal for a wide range of applications.