Mechanical Manifold Gauge Set Number of Valves 2 R-134A Number of Hoses 3 72 in 0 to 500 psig 30 in Hg to 120 psi 1/4 in Forged Aluminum Alloy Forged with 3-1/8 in dia High and Low Side Gauges Valves Utilize Double O-Ring Piston Includes 100 Mesh Filter in Line on All Flare Fittings Sight Glass