PneumaticPlus PSB15-160CP Air Pressure Gauge for Air Compressor WOG Water Oil Gas Chrome Plated 1-1/2" Dial Center Back Mount 1/8" NPT 0-160 Standard Back Mount 0 to 160 PSI 1-1/2" Dial Dry Pressure Gauge Suitable for Air, Water, Oil, & Gas 1/8" NPT Connection