Well Pump Water Pressure Gauge Liquid Filled 0-100 Psi High quality steel liquid filled pressure gauge. The glycerin filling and built-in snubber dampen the effects of pulsation and vibration,while perpetually lubricating the movement (and keeping contaminates such as dirt away from all moving parts) which will extend its life. Construction: Steel case and bezel with plastic lens. Brass internals & connection. Phosphor bronze Pressure Range: 0-100 PSI Connection: 1/4" MNPT bottom Accuracy: 2% 30 to 160 degrees Fahrenheit