[PREMIUM SURFACE CLEANER]- This sidewalk cleaner for pressure washer delivers a commercial level cleaning, 18' ground surface cleaning. Max working pressure: 4000 PSI at 10.5 GPM. Min. Operating pressure: 2000 PSI at 3 GPM. NOTE: The high-pressure washer equipment connected to the surface cleaner shall not be less than 1000PSI. Higher pressure brings a cleaner washing effect. The nozzles are very small, which is particularly easy to block. As long as one is blocked, none of the three will work. [STAINLESS STEEL HOUSING]- This product has heavy-duty stainless steel housing with a light aluminum handle. Equipped with a rotary rod with three jets, it offers efficient cleaning. Tough bristles control over-spray. [EFFICIENT OPERATION]- This 4000 psi surface cleaner features dual handles with rubber covers for comfortable use. They are designed with a trigger gun for connecting the pressure washer hose. Both handles are angle adjustable. Four PCs universal castors are for smooth movement. [C