Digital Manifold Air Pressure Gauge SetDY517A Pressure Gauge Refrigeration Digital Vacuum Pressure Manifold Tester Meter HVAC Temperature Tester Valve Tool Kit The intelligent electronic refrigerant group instrument is an auxiliary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners and cold storage. The instrument has double pressure test, dual temperature test (need test clip,not include), digital readout, multi unit switching,
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