Mechanical Manifold Gauge Set, Number of Valves 4, R-134A, Number of Hoses 4, 60 in, 0 to 500 psi, 30 in Hg to 350 psi, 3/8 in, Oversize Internal Passages, Easy to Read Color Coded Scales, Ergonomic Handles, Pulsation Gauges, UL Recognized, Includes Hi Performance Hoses, 800 psi Working Pressure, 4,000 psi Burst Pressure