Faria Chesapeake White SS 2" Fuel Level Gauge - Metric (E-1/2-F) 
Chesapeake White SS 2" Fuel Level Gauge - Metric (E-1/2-F)
Perimeter-lighted White dial with stylish Blue and White graphics, polished stainless steel bezel, contoured white pointer and domed glass lens.
Fuel Level gauge operates by sending a low amperage current through the gauges meter to ground via a sending unit with variable resistance. The resistance of the sending units increase or decrease 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 level of fuel.
2" - Hole Size: 2.0625" (53mm)
- Metric Anti-scratch glass lens
- 12 VDC negative ground
- Can be adapted for 24 VDC systems
Factory P/N GP9791
Owner's Manual (pdf)