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Blackmax Pressure and Temperature Gauge PT200W$325.99
Pressure and Temperature Gauge, Wireless, Measuring Range 14.5 to 750 PSIG, Ambient Operating Range (F) 23 Degrees to 149 Degrees , Connection 1/4 in SAE Refrigerant, Display 5 Digit LCD, Power Supply 9V Alkaline Battery, Includes Double-Wall Cloth Storage Case, Hanger Hook, Stainless Steel T Connector, Thermistor Sensor (Clamp with 6 ft Lead)