Faria Heavy-Duty 2" Oil Pressure Gauge (80 PSI) - Black Hooks & Clamps Mounting Hole Diameter Inches: 1-5/8

Mounting Hole Diameter Inches: 1-5/8

Connects to 1/0 to 8 gauge power cable

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Faria Heavy-Duty 2" Oil Pressure Gauge (80 PSI) - Black Hooks & Clamps Mounting Hole Diameter Inches: 1-5/8Heavy Duty 2" Oil Pressure Gauge (80 PSI) Black A pressure gauge operates by sending a low amperage current through the gauges' meter to the ground via a sending unit with variable resistance. The resistance of the sending units increases or decreases with the changes in pressure, temperature, etc As the sender's resistance varies, the amount of current allowed to flow through it to ground changes and the meter deflects, showing the change in