1. HVAC Manifold Gauge sets 2. For refrigerant R12, R134a,R502,R407c REFRIGERANT GAUGE MANIFOLD SET WHOLESLE!Key Features:1. ... open/close valve6. Oversized sightgalss for easy viewing7. Excellent vacuum characteristics8. No-flutter gauge design9. Easy-to-grip ... knobsTechnical Paramter:1.Model:QX-BZ134a2.Refrigerants:R22,R134a,R12,R407c,R5023.Pressure: - ...