This sealing gasket is designed to ensure watertightness at the fuel gauge sender, an essential component for the proper operation of fuel level indication. Its replacement is recommended during any intervention on the fuel supply circuit or in the event of a leak detected around the fuel tank sender. As part of the restoration or maintenance of a classic vehicle, maintaining the watertightness of this assembly helps prevent any risk related to fuel vapours. A simple but essential part to guarantee the reliability of the vehicle in the long term.