1.s.s case / brass internal 2.Glycerine filled 3.63mm 4.accuracy 1.6% Pressure Gauge -- OEM Service ... '', 2.0'', 2.5'';4. Thread: NPT, BSP;5. Oil Filled;6. NBR O Ring could be added;We could supply ... , Trie Pressure Gauge, Refrigeration Gauge, Thermal Meter, Air Test Gauge, Water Test Meter etc. Have questions or needs, please feel free ...