Ecological device to be inserted along the fuel vent pipe with double function

Environmentally friendly device to be inserted along the fuel vent pipe with dual function

Its functions are: 1) it only lets air through and blocks the fuel when it arrives, so it eliminates fuel streaks on the side of the boat; 2) when the fuel is in the vicinity of this device, it emits a characteristic hissing sound that signals "tank full."

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