NOS The original, patented NOS Fogger(TM) nozzle revolutionized the way nitrous oxide and fuel were dispersed into an engine. And to this day, there's nothing better than it for a variety of applications. Changing power levels takes only seconds and is simply a matter of changing the fuel and nitrous jets on the nozzle. The original Fogger Nozzles are made from brass and have a black finish. They feature an etched NOS logo and tags for fuel and N20 identification during installation or jet changes.