Package Include The water level gauge sensor is standard SAE 5 hole pattern. Fuel Gauge x1, Sending Unit x1, NBR Mounting Gasket x1, 10-24 Hex Screws x 5, Installation Instruction.
Unique DesignTo avoid sender hit bottom of tank, the length of fuel sensor should be 1" less than the depth of the tank. If you need to drill the hole, diameter 1-1/2" (38mm) hole would be Perfect. The diameter of float is 1.38" (35mm).