K4555 Gas Test Gauge 4 In Connection Size 3/4 In NPT Connection Location Stem Mount Lower Accuracy (%) 1% Case Material Steel Display 4 In (100mm) White Aluminum With Black And Blue Markings Display Units PSI or Hg Resolution 1/10th PSI or 1/2 In Hg Operating Temp Range (F) (-4F) to 160F Series 40 KB Includes Hex Body And Schrader Air Valve Manufacturers Warranty Length 1 Year Range 6 PSI-12 In Hg