Mechanical Manifold Gauge Set, Number of Valves 4, R-22, R-404A, R-410A, Number of Hoses 4, 60 in, 0 to 800 psi, 30 in Hg to 500 psi, 3/8 in, Diaphragm Type Valves and Pulsation Resistant Gauges, UL Recognized