Stainless steel rotary nozzles are the most resistant tips against wear and corrosion. They are to be used with super heavy duty pressure washers whose pressure reaches as much as 7300 PSI.
It is highly recommended a high pressure filter be attached to the inlet of the rotating nozzle. This will help prevent debris from your water supply from entering the nozzle and destroying the internal components, thus increasing the life of your nozzle.