manifold gauge set Refrigerant R12/22/502 Good quality, best service Featuresrefrigerants R12 R22 502 Aluminum block body one full turn open/close valveRefrigerants, All refrigerants available, max 4 different refrigerants in each gauge Pressure, Psl, Bar, Kg/cm3, mmHg, max 2 units in each gauge Hose 36', 60', 72'; 500-2500Psi, 600-3000Psi, 800-4000Psi