Mechanical Manifold Gauge Set, Number of Valves 4, R-12, R-22, R-502, Number of Hoses 4, 60 in, 0 to 800 psi, 30 in Hg to 350 psi, 3/8 in, Oversized Internal Passages for Faster Evacuation, Precision Flutter and Pulsation Resistant with Protective...