Mechanical Manifold Gauge Set, Number of Valves 2, R-22, R-404A, R-410A, Number of Hoses 3, 60 in, 0 to 800 psi, 30 in Hg to 500 psi, 1/4 in, Brass, Pulsation Resistant Gauges, Valves are Full Flow Dual O-Ring, UL Recognized