Erie Tools Pressure Washer Rotating Turbo Nozzle 5,000 PSI, 4.0 Orifice, 4.5 GPM with 1/4" Quick Connect Plug Maximum Pressure: 5,000 PSI Gallons Per Minute: 4.5 Nozzle Orifice Size: 4.0 Maximum Operating Temperature: 212&deg; F 1/4-inch steel, stainless steel Quick Connect plug.