Replacement Fuel Line which fits between the carb and the fuel tank.
Generator Guru says:
If not already fitted to the fuel line, we recommend adding an in-line fuel filter as a must.
These filters help protect your engine, as well as making it easy to see the purity of the fuel. They prevent dirty fuel and foreign particles (eg from rusting metal fuel tanks,) being pulled into the engine and carburettor.
Alternatively you can purchase with a new In-line fuel filter already attached.