The Rothenberger Industrial Manifold for refrigerant systems with R12, R22, R134A & R407C gases with a 2-way manifold set and with charging hoses at 500psi of working pressure. For smooth opening & closing of the valves , the Rothenberger Industrial Manifold has a well designed knobs. The Rothenberger Industrial Manifold set has color-coded reading scales in its gauges for easy monitoring & precise measurement, respective of the gas used. Replacement Against Manufacturing defect (6 Months)