CrossChem Australia’s Automatic AdBlue Shut off Nozzle. This nozzle is fitted with a device that automatically shut’s off the flow when the AdBlue fuel tank is full. It also protects the user from contaminating their diesel tank with AdBlue as the internal magnet does not operate unless inserted into the AdBlue tank of the vehicle. Complete with swivel connector. Light gauge PVC Plastic allows easy holding with a cost effective price tag.