2 Professional HVAC Service and refrigerant handling tools together sold as a kit: Corona Discharge Sensor /Electronic Leak Detector for all Halogenated refrigerants like R22 R134a R410a R404a R407c R12 R502 etc Manifold gauge set to handle all refrigerants. Manifold gauge set: Temperature Marked in F for R410a R22 R134a R404a R12, Pressure in PSIG