Certifiable Extractor Gauge ( 30) 350 PSI Vacuum Chamber Mobil Vacuum Pump Oil has Recovery Pump Mobil Vacuum Pump Oil has good demulsibility (Ability to separate oil from water) Which aids water removal and prevents its return to metal surfaces to cause rust and corrosion 75” Diameter Vacuum Gauge (Glycerin Filled) InHG (0) ( 30) Manifold Connections 1 4" SAE and 1 4" FNPT Temperature Rating 150°F (65°C) Additional Included Items 5' Purple Vacuum Rated HVAC Hose Use a compound gauge when measuring a system that is pushing both positive and negative pressure on the gauge BVV™ Extractor Gauge has a 1 4" MNPT stainless steel connection with a readout of ( 30) 0 350 PSI