Capacitance fuel level sender 24" long, 5" bendable section is between black mark and mounting flange, 1/4" OD, 12 or 24 VDC (28V MAX) input, 0-5 VDC output
Typical SAE mounting flange              Instructions
The nominal supply range is 11-28vdc.  The current is less that 30 milliamps (.03 amps).